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1 tháng 8 2021

Trả lời :

3. Would you me to get you something to drink? ~ _________.

A. That would be nice

B. No, I’m sorry

C. That’s too bad

D. My pleasure

1 tháng 8 2021

Trả lời :

3. Would you me to get you something to drink? ~ _________.

A. That would be nice

B. No, I’m sorry

C. That’s too bad

D. My pleasure

2. This is the _________book I have ever read.

    A. bad   B. worse            C. worst            D. badly

1 tháng 8 2021

HELP ME

31 tháng 7 2021

\(1,a^2-2a+1-b^2\)

\(=\left(a^2-2a+1\right)-b^2\)

\(=\left(a-1\right)^2-b^2\)

\(=\left(a-1-b\right)\left(a-1+b\right)\)       Khai triển thành hằng đẳng thức số 3 e  nhé.

\(2,x^2+2xy+y^2-81\)

\(=\left(x^2+2xy+y^2\right)-81\)

\(=\left(x+y\right)^2-9^2\)

\(=\left(x+y-9\right)\left(x+y+9\right)\)Cái này cũng HĐT số 3 nè

\(3,x^2+6y-9-y^2\)

\(=-\left(y^2-6y+9\right)+x^2\)

\(=-\left(y-3\right)^2+x^2\)

\(=x^2-\left(y-3\right)^2\)

\(=\left(x-y-3\right)\left(x-y+3\right)\)

\(5,4x^2+y^2-9-4xy\)

\(=\left(4x^2-4xy+y^2\right)-9\)

\(=\left(2x-y\right)^2-3^2\)

\(=\left(2x-y-3\right)\left(2x-y+3\right)\)

Học tốt

đi Bắc cực chắc ổng chết queo rồi chứ mà thấy chim cánh cụt
:333

cho tui nha:333 yêu bạn 

31 tháng 7 2021

5,1

mk nghi the

\(\frac{-8}{5}\)<\(\frac{-7}{4}\)<\(\frac{-8}{6}\)

30 tháng 7 2021
D. Bộ ăn sâu bọ
PRACTICE TEST 3 – GRADE 7 Choose A, B, C or D to indicate the word whose underlined part is pronounced differently from the others.1. A. played                     B. frightened                   C. laughed                       D. bored2. A. education               B. collection                    C. question                      D. celebration Choose A, B, C or D to indicate the word that differs from the other three in the position of primary stress in each of the following questions.3. A....
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PRACTICE TEST 3 – GRADE 7

 

Choose A, B, C or D to indicate the word whose underlined part is pronounced differently from the others.

1. A. played                     B. frightened                   C. laughed                       D. bored

2. A. education               B. collection                    C. question                      D. celebration

 

Choose A, B, C or D to indicate the word that differs from the other three in the position of primary stress in each of the following questions.

3. A. performance         B. festival                         C. celebrate                     D. seasonal

4. A. gather                      B. reduce                         C. provide                        D. affect

 

Choose A, B, C or D to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.

5. Despicable Me is a hilarious film - I couldn’t help laughing from beginning to the end.

A. unable to laugh                                                     B. unable to help

C. unable to stop laughing                                      D. unable to stop helping

 

Choose A, B, C or D to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

6. You cannot grow crops are exhausted land.

 A. used                            B. fertile                            C. empty                          D. nutritious

 

Choose A, B, C or D to indicate the correct answer to each of the following questions.

7. - “ How about watching a film?” - “…………………………….” 

   A. No, I don’t like it at all.                                        B. Sounds great.

   C. Who is in it?                                                           D. I’m sorry, 1 can’t.      

8. Solar and wind ………….. instead of fossil fuels within 20 years?

A. are used                      B. will be used                 C. will use                       D. will be using

9. Is Minh ………………. with the final semester’s result?

A. satisfy                         B. be satisfying                C. satisfying                    D. satisfied

10. Nobody can predict exactly when supplies of fossil fuels will be ................. However, we all know they quickly reduce in quantity.

A. installed                     B. polluted                        C. harmful                       D. exhausted

11. I am sorry I am not ................. fast.

   A. used to drive                                                         B. used to driving

   C. use to drive                                                           D. use to driving

12. ………………. he is a CEO and earns a lot of money, he is very mean.

A. Although                    B. In spite of                     C. Despite                        D. Nevertheless

13. The festival ………………. annually at the end of August.

A. holds                           B. held                               C. takes place                 D. are held

14. Elaine bought .................. dress at the mall.

A. yours                           B. mine                              C. her                               D. hers

15. In India, the demand for ................. has always been more than the supply.

A. shortage                     B. sources                         C. slogan                          D. electricity

16. Do you think renewable energy ……………..fossil energy before 2030?

A. will replace                B. is replacing                 C. will be replacing        D. will be replaced

 

Read the following passage and choose A, B, C or D to indicate the correct answer to each of the questions.

17. We didn’t (A) used to (B) have (C) a colorful TV, but we do (D) now.

18. In spite of (A) being tiring (B), they wanted (C) to watch (D) the film.

 

Read the following passage and choose A, B, C or D to indicate the correct answer to each of the questions.

CARBON FOOTPRINTS

19 a. As

b. Although

c. However

d. Due to

20. a. for

b. to

c. on

d. in

21. a. replace

b. reuse

c. increase

d. balance

22. a. moving

b. decreasing

c. rising

d. falling

Everybody has a carbon footprint - it's the amount of carbon dioxide we produce with any action or activity. (19)__________________carbon dioxide contributes to 'greenhouse gases', our carbon footprints have a direct impact (20)________________the environment. You can estimate your carbon footprint on any number of popular websites: if it's small, then you're probably leading a relatively green lifestyle. But what happens if it's big?
            Well, the answer is that you can (21) ______________it. This modern answer to the problem is for people to contribute to balancing the negative effects of their actions by using green fuels, recycling, reforestation and a number of other activities which are said to contribute to a lowering of (22)_________________carbon dioxide.

 

 

 

 

 

Choose A, B, C or D to indicate the underlined part that needs correction in each of the following questions.

Right now, a private company is developing something called ET3. ET3 stands for Evacuated Tube Transport Technology.

The ET3 system would reportedly be able to take passengers from New York to Beijing in just two hours. Here is how it works. A vacuum tube goes all the way from New York to Beijing. The tube is only a few meters wide. Capsules move through the tube. Six people can sit in one capsule. The capsules use electricity instead of gasoline. For international travel, the capsules can travel at about 6,500 kilometers per hour. That is much faster than an airplane!                        

So how can these capsules travel so fast? The answer is that there is no air inside the tube. When airplanes fly, they have to move through the air. The air resistance slows the airplanes down. Because there is no air in the ET3 tubes, the capsules are able to move at a very high speed. Besides, the capsules are quite light. They only weigh 183 kilograms.

Of course, ET3 doesn’t exist yet. Developers still have to solve a lot of problems. The biggest problem is that right now, ET3 would be far too expensive. In order to make ET3 cheaper, we will need much better technology. Maybe someday, you will be able to have lunch in New York and dinner in Beijing.

23. The word “works” in paragraph 2 is closest in meaning to ______.

a. travels                        b. operates                 c. earns money                       d. succeeds

24. According to the passage, which statement is NOT true.

 a. Each ET3 capsule can carry up to six people.

 b. We don’t know how to build its capsules

c. Speed in ET3 system is 6,500 km/h for international travel. 

d. ET3 can travel a little faster than an airplane.

25. What can be inferred from the passage?

a. There is still a lot to do before putting ET3 into operation.

b. In the future, people will mainly use ET3 to travel abroad.

c. ET3 won’t be used domestically due to its high-cost

d. ET3 will soon be cheaper.

 

Choose A, B, C or D to find out a sentence that has the same meaning as the given one.

26. They built the first hydroelectric power plant in Niagara Falls in 1879.

A. In 1879, they was built the first hydroelectric power plant in Niagara Falls

B. The Niagara Falls was built in the first hydroelectric power plant in 1879.

C. The first hydroelectric power plant in Niagara Falls was build in 1879.

D. The first hydroelectric power plant was built in Niagara Falls in 1879.

 

27. He is not a poor man any more, but he becomes a rich businessman.

A. Although being a rich businessman, he’s still poor.

B. He is used to being a rich businessman, there’s no way that he becomes a poor man.

C. He used to be a poor man, but now he doesn’t any more.

D. In spite of his richness, he becomes a poor man any way.

 

28. Although coal is the most polluting of fossil fuels, it is still the largest sources of energy worldwide.

A. Despite of being the most polluting of fossil fuels, it is still the largest sources of energy worldwide.

B. Coal is the most polluting of fossil fuels, but it is still the largest sources of energy worldwide.

C. Despite being the most polluting of fossil fuels, coal is still the largest sources of energy worldwide.

D. However coal is still the largest sources of energy worldwide, it is the most polluting of fossil fuels.

 

 

Choose A, B, C or D to find out a sentence that is meaningful based on the given words.

29. Number/ people/ this/ small area/ be/ increase/ quickly/ next/ 20 years.

A. The number of people in this small area will increase quickly in the next 20 years.

B. The number of people in this small area will be increasing quickly in the next 20 years.

C. The number of people in this small area will be increased quickly in the next 20 years.

D. The number of people in this small area is creasing quickly in the next 20 years.

30. Government/ be/ organize/ educational campaigns/ use/ renewable energy sources.

A. The government will be organizing educational campaigns on using renewable energy sources.

B. Educational campaigns on using renewable energy sources will be organize by the government.

C. The government are organizing educational campaigns on using renewable energy sources.

D. The government is organizing educational campaigns on using renewable energy sources.

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30 tháng 7 2021

Câu hỏi của Hồ Đoàn Bảo Ngân - Toán lớp 7 - Học trực tuyến OLM 

mình đã làm rồi nhé, nếu ko hiện link thì vào tkhđ của mình hoặc ib mình gửi cho nhé 

EXERCISES:             I.      Put the verbs in brackets into the correct form (V-ing , V, participle).1.         I caught him (climb) _____ over my wall. I asked him (explain) _____ but he refused (say) _____ anything, so in the end I had (let) _____ him (go) _____.2.         When at last I succeeded in (convince) _____ him that I wanted (get) _____ home quickly he put his foot on the accelerator and I felt the car (leap) _____ forward.3.         I'm not used to (drive) _____on the left. When...
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EXERCISES:

             I.      Put the verbs in brackets into the correct form (V-ing , V, participle).

1.         I caught him (climb) _____ over my wall. I asked him (explain) _____ but he refused (say) _____ anything, so in the end I had (let) _____ him (go) _____.

2.         When at last I succeeded in (convince) _____ him that I wanted (get) _____ home quickly he put his foot on the accelerator and I felt the car (leap) _____ forward.

3.         I'm not used to (drive) _____on the left.
When you see everyone else (do)____ it you'll find it quite easy (do) _____yourself.

4.         It is pleasant (sit) _____by the fire at night and (hear) _____the wind (howl) _____outside.

5.         There was no way of (get) _____out of the building except by (climb) _____down a rope and Ann was too terrified (do) _____this.

6.         We heard the engines (roar) _____as the plane began (move) _____ and we saw the people on the ground (wave) _____good-bye.

7.         It's no good (write) _____ to him; he never answers letters. The only thing (do) _____ is (go)_____ and (see) _____him.

8.         Why did you go all round the field instead of (walk) _____ across it?
I didn't like (cross) _____it because of the bull. I never see a bull without (think) _____that it wants (chase) _____ me.

9.         The people in the flat below seem (be) _____  having a party. You can hear the champagne corks (thud)_____ against their ceiling.

10.     I don't like (get) _____bills but when I do get them I like (pay) _____them promptly.

11.     Ask him (come) _____in. Don't keep him (stand) _____at the door.

12.     The boys next door used (like) _____(make) _____ and (fly) _____ model aero planes, but they seem to have stopped (do) _____ that now.

13.     I knew I wasn't the first (arrive)_____, for I saw smoke (rise) _____from the chimney.

14.     We watched the men (saw) _____the tree and as we were walking away heard it (fall) _____with a tremendous crash.

15.     I hate (see) _____a child (cry) _____.

16.     We watched the children (jump) _____from a window and (fall) _____into a blanket held by the people below.

17.     It is very unpleasant (wake) _____ up and (hear) _____ the rain (beat) _____on the windows.

18.     He saw the lorry (begin) _____ (roll) _____ forwards but he was too far away (do) _____ anything (stop)  _____it.

19.     There are people who can't help (laugh) _____when they see someone (slip) _____on a banana skin.

20.     I prefer (drive) _____ to (be driven) _____.

II. Multiple choices

1. All the passengers were made ________ their seat belts during the turbulence.

a. buckle                            b. to buckle                 c. buckling                   d. for buckling.

2. ________ good ice cream, you need to use a lot of cream.

a. Make                             b. Making                    c. To make                   d. For make

3. I got my friend ________ her car for the weekend.

a. to let me to borrow                                            b. to let me borrow

c. let me borrow                                                    d. let me to borrow

4. How can you let such a silly incident ________ your friendship?

a. wreck                 b. to wreck                  c. wrecking                  d. that wrecks

5. ‘How about going to the theater?' 'OK,' but I would rather ______ a concert.'

a. attend                b. to attend                  c. attending                 d. have attended

6. The skiers would rather  ________ through the mountains than go by bus.

a. to travel on train                                                b. traveled by train

c. travel by train                                                    d. traveling by the train

7. If we leave now for our trip, we can drive half the distance before we stop ___ lunch.

a. having                b. to have                    c. having had   d. for having

8. The examiner made us ___ our identification in order to be admitted to the test center.

a. show                  b. showing                   c. to show                    d. showed

9. As we entered the room, we saw a rat ________ towards a hole in the skirting board.

a. scamper             b. to scamper   c. scampering              d. was scampering

10. I remember ________ to Paris when I was a very small child.

a. to be taken         b. to take                     c. being taken d. taking

11. My parents wouldn't _______ to the party.

a. allow me go       b. allow me to go    c. allow me going            d. allow to go

12. We are going to have my house _______ tomorrow morning.

a. paint                  b. painting                   c. painted                    d. to be painted

13. We hope that the students themselves will enjoy ______ part in the projects.

a. to take               b. taking                      c. to be taken   d. being taken

14. Sally's low test scores kept her from _______ to the university.

a. admitting           b. to admit                   c. to be admitted      d. being admitted

15. Are you sure you told me about the party? I don't recall _______ about it.

a. having told        b. to have told             c. having been told   d. to have been told

16. I meant to get up early but I forgot _______ up my alarm clock.

a. wind                  b. to wind                    c. wind                        d. wound

17. Look at the state of the gate. It needs ________ as soon as possible.

a. to repair             b. repairing                  c. being repaired          d. be repaired

18. Alice didn't expect ________ to Bill's party.  

a. asking                b. being asked             c. to ask                       d. to be asked

19. We asked ________ the piano so early in the morning, but she won't.

a. Marie to stop playing                            b. Marie stop to play

c. that Marie stops playing                                    d. Marie to stop to play

20. A good teacher makes her students ________ the world from new perspectives.

a. to view b. view                        c. to be viewed            d. viewing

 

 

 

 

 

 

 

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