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7 tháng 3 2020

1.d
2.b
3.a

7 tháng 3 2020

Chọn phương án đúng nhất điền vào chỗ trống

1 There used to be fewer  people and_______on the roads

a) Roofs

b) Helmets

c) Helicopters

d) Vehicles

2 Do you know  the ______in the UK is to keep to the left?
a) Traffic  light

b)Traffic rule

c) Traffic jam

d) Speed limit

3 The______for motorcycles in 40 km/h in towns and 60 km/h outside urban areas

a) Speed limit

b) Driving licence

c) Traffic rule

d) Traffic light

EX2: Viết các câu sau ở thể khẳng định (+), thể phủ định (-), thể nghi vấn (?) ở thì quá khứ đơn.1.     (+) They decided to leave soon.(-) ________________________________________________________________.(?) ________________________________________________________________?2.      (+) ________________________________________________________________.(-) There were not many homeless people here ten years ago.(?)...
Đọc tiếp

EX2: Viết các câu sau ở thể khẳng định (+), thể phủ định (-), thể nghi vấn (?) ở thì quá khứ đơn.
1.     (+) They decided to leave soon.
(-) ________________________________________________________________.
(?) ________________________________________________________________?
2.      (+) ________________________________________________________________.
(-) There were not many homeless people here ten years ago.
(?) ________________________________________________________________?
3.      (+) ________________________________________________________________.
(-) _________________________________________________________________.
(?) Did Tom’s grandfather use to be a soldier?
4.      (+) My teacher started teaching here 6 years ago.
(-)_________________________________________________________________.
(?) _________________________________________________________________?
5.      (+) Jane often went to school on foot 3 years ago.
(-) _________________________________________________________________.
(?) _________________________________________________________________?
6.      (+) _________________________________________________________________.
(-) The cat didn’t want to eat yesterday.
(?) _________________________________________________________________?
7.      (+) _________________________________________________________________.
(-) __________________________________________________________________.
(?) Did the train arrive late yesterday?
8.      (+) _________________________________________________________________.
(-) There wasn’t anything left in the fridge.
(?) _________________________________________________________________?
EX3. Chia các động từ trong ngoặc ở thì quá khứ đơn.
1. Last week, my mother (take) _____________ me to the zoo.
2. When we (arrive) _____________ at the party, there (not be) _____________ many people there.
3. My mother (say) _____________ that she (buy) _____________ me a new dress.
4. Last summer, my father (teach) _____________ me to drive.
5. I (start) _____________ doing charity when I (be) _____________ a first year student.
6. Many rich people (donate) _____________ money for this volunteer program.
7. My friend (ring) _____________ me yesterday and (invite) _____________ me to his party.
8. What (you/ watch) _____________ on TV last night?
9. When my father (be) _____________ young, he (use to) _____________ be the most handsome boy in the village.
10.  _____________ (you/ go) to see the concert yesterday?
11. My performance (not be) _____________ really good. I (not feel) _____________ happy about it.
12. Jim (spend) _____________ the whole day taking after his brother.
13. I (write) _____________ a letter to my foreign friend but he (not write) _____________ back.
14.  _____________ (they/ be) students of our school?
15. Yesterday, I (see) _____________ Jim at a bookstore.
EX4. Gạch lỗi sai trong các câu sau rồi sửa lại cho đúng.
1. My friend and I was at the hairdresser’s yesterday.
________________________________________________________________________
2. My sister in law used to had long hair but now she has short hair.
________________________________________________________________________
3. Did your father worked in a tobacco factory before he retired?
________________________________________________________________________
4. Why you didn’t come to the meeting last week?
________________________________________________________________________
5. My best friend and I use to hated each other when we first met.
________________________________________________________________________
6. Was Anna be successful with her project last week?
________________________________________________________________________
7. Yesterday morning I readed several chapters of the book “The little prince”.
________________________________________________________________________
8. Last summer we involved in community service in our neighborhood, so we did go on holiday.
________________________________________________________________________
EX5. Hoàn thành câu với những động từ cho sẵn ở thì quá khứ đơn (thể khẳng định hoặc phủ định).
 
disturb                              put                          like                          be                        hold
have                                 decide                    sleep                        stay                      cost     
1. It was freezing outside, so I ___________ on my coat.
2. My mother was very busy yesterday, so I ___________ her.
3. Yesterday was Mary’s birthday but she ___________ a party.
4. We were exhausted, so we ___________ to leave the party early.
5. The bed was very uncomfortable. Tim ___________ well.
6. The musical wasn’t very good. I ___________ it much.
7. The restaurant wasn’t very expensive. It ___________ much to have dinner there.
8. I had to look after my little sister yesterday, so I  ___________ time to call you.
9. It ___________ hard to lift the boxes. They weren’t very heavy.
10. It was raining heavily, so I ___________ in.
EX6. Sắp xếp các từ cho sẵn thành câu hoàn chỉnh.
1. many/ went/ to/ volunteer/ ,/ Last year/ the/ and/ flooded area/ free food/ people/ gave to/./
________________________________________________________________________
2. rebuild/ helped/ houses/ They/ trees/ also/ plant/ and/ people/./
________________________________________________________________________
3. people/ donated/ generous/ for/ people/ Many/ poor/ money/./
________________________________________________________________________
4. I/ joined/ a student/ ,/ was/ When/ charitable work/ I/ often/ in/./
________________________________________________________________________
5. my friends/ used to/ remoted areas/ travel/ help/ to/ to/ people there/ I/ with/./
________________________________________________________________________
6. mountainous/ for/ areas/ weeks/ We/ in/ stayed/ the/./
________________________________________________________________________
7. the chidren/ read/ there/ We/ taught/ and/ write/ to/./
________________________________________________________________________
8. a volunteer/ was/ a/ experience/ wonderful/ Being/./
________________________________________________________________________
9. I/ busy/ graduated/ was/ After/ ,/ I/ very/./
________________________________________________________________________
10. I/ Now/ do/ still/ charity/ my/ in/ hometown/./
________________________________________________________________________

 

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0
7 tháng 3 2020

1We didn't use to go to school by bus.
2He used to ride a bike for exercise.
3Did Tim use to be a taxi driver?
4He didn't use to smoke ten cigarettes a day.
5Did you use to ride a motorbike without wearing a helmet?
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7 tháng 3 2020

\(\frac{3x-2y}{37}=\frac{5y-3z}{15}=\frac{2z-5x}{2}\)

\(\Leftrightarrow\frac{5\left(3x-2y\right)}{5.37}=\frac{2\left(5y-3z\right)}{2.15}=\frac{3\left(2z-5x\right)}{3.2}\)

\(\Leftrightarrow\frac{15x-10y}{5.37}=\frac{10y-6z}{2.15}=\frac{6z-15x}{3.2}\)

Áp dụng tính chất của dãy tỉ số bằng nhau:

\(\Rightarrow\frac{15x-10y}{5.37}=\frac{10y-6z}{2.15}=\frac{6z-15x}{3.2}=\frac{15x-10y+10y-6z+6z-15x}{5.37+2.15+3.2}=0\)

\(\Rightarrow\hept{\begin{cases}\frac{3x-2y}{37}=0\\\frac{5y-3z}{15}=0\end{cases}\Leftrightarrow\hept{\begin{cases}3x-2y=0\\5y-3z=10\end{cases}\Leftrightarrow}\hept{\begin{cases}3x=2y\\5y=3z\end{cases}\Leftrightarrow}\hept{\begin{cases}\frac{x}{2}=\frac{y}{3}\\\frac{y}{3}=\frac{z}{5}\end{cases}\Leftrightarrow}\frac{x}{2}=\frac{y}{3}=\frac{z}{5}}\)

\(\Leftrightarrow\frac{10x}{20}=\frac{3y}{9}=\frac{2z}{10}\)

Áp dụng tính của dãy tỉ số bằng nhau:

\(\Leftrightarrow\frac{10x}{20}=\frac{3y}{9}=\frac{2z}{10}=\frac{10x-3y-2z}{20-9-10}=-\frac{4}{1}\)

\(\Leftrightarrow\hept{\begin{cases}\frac{x}{2}=-4\\\frac{y}{3}=-4\\\frac{z}{5}=-4\end{cases}\Leftrightarrow\hept{\begin{cases}x=-8\\y=-12\\z=-20\end{cases}}}\)

Để \(\frac{x^2+7}{x+1}\)nhận giá trị nguyên thì \(x^2+7⋮x+1\left(1\right)\)

+)Ta có:\(x+1⋮x+1\)

\(\Rightarrow x.\left(x+1\right)⋮x+1\)

\(\Rightarrow x^2+x⋮x+1\left(2\right)\)

+)Từ (1) và (2)

\(\Rightarrow\left(x^2+x\right)-\left(x^2+7\right)⋮x+1\)

\(\Rightarrow x^2+x-x^2-7⋮x+1\)

\(\Rightarrow x-7⋮x+1\left(3\right)\)

+)Ta lại có:\(x+1⋮x+1\left(4\right)\)

+)Từ (3) và (4)

\(\Rightarrow\left(x+1\right)-\left(x-7\right)⋮x+1\)

\(\Rightarrow x+1-x+7⋮x+1\)

\(\Rightarrow8⋮x+1\)

\(\Rightarrow x+1\in\left\{\pm1;\pm2;\pm4;\pm8\right\}\)

\(\Rightarrow x\in\left\{-2;0;-3;1;-5;3;-9;7\right\}\in Z\)

Vậy \(x\in\left\{-2;0;-3;1;-5;3;-9;7\right\}\)

Chúc bn học tốt

7 tháng 3 2020

1.A
2.P
3.P
4.A
5.P

8 tháng 3 2020

1 They grow coffee in more than 50 countries around the world__A________

2 The book was bought yesterday____P_____

3 Tim was invited to Kate"s birthday party ___P____

4 She feeds her dogs twice a day___A_______

5 My keys were lost yesterday__P__

a/ xét 2 tam giác AMB và CMK có:

AM = MC (M là t/đ AC)

góc KMC = góc BMA (đối đỉnh)

MK = MB (gt)

=> tam giác AMB = tam giác CMK (c.g.c)

=> góc MAB =  góc MCK = 90 độ hay KC vuông AC (đpcm)

b. xét hai tam giác AMK và CMB có:

AM = MC (M là t/đ AC)

góc AMK = góc CMB (đối đỉnh)

MK = MB (gt)

=> tg AMK = tg CMB (c.g.c)

=> góc AKM = góc CBM mà hai góc này ở vị trí sole trong nên AK // BC (đpcm)

7 tháng 3 2020

1.A

2.A

3.A

7 tháng 3 2020

1 It is dangerous to ride a motorbike without a...................

A) helmet

B) triangle

C) tricycle

D) cirlcle

2 In Ha Noi, during rush hour , some road users ride their motorbikes on the .....................

A) driving licence

B) lane

C) pavement

D) seat belt

3 Traffic is terrible  during the ..............when everyone is in a hurry to get to work or come back home
A) traffic light
B) road  sign

C) traffic rule

D) rush hour

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