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Part 3: Give the correct form of the verb in brackets. (1,5 m)
Famous places in Ha Noi (visit) ………are visited………every year.
Lan (move) ……………moved…………….to Ho Chi Minh city with her family last summer.
Those students (walk) ………are walking………..up the mountain to visit the shrine of a Vietnamese hero at present.
If we use much pesticide on vegetables, the vegetables (become)………will become……….poisonous and inedible.
How about (make)…………making………….posters on energy and hanging them around our school?
Would you like (have)………to have………..a drink?
Part 4: Give the correct forms of the words in the brackets to finish the following sentences. (1,0 m)
What have fashion designers done to (modern)…………mordernize………the ao dai?
A computer can gather a lot of (inform)…………information…………for different purposes.
In order to keep our environment (pollute) ………unpolluted……….., we shouldn’t drop litter in public places.
Our teacher is pleased that we solved the problems (effect) …………effectively…………..
Part 5: Choose the words or phrases in brackets that best completes each sentence. (1,0 m)
Jeans have never been out of fashion, and today young generation is still fond (in/ on/ at/ of) ……of…….wearing them.
(A/ An/ The/ Every)………The…….Parkers are nice, so van feels like a member of their family.
You (did/ didn’t do/ had/ hadn’t)……didn't do………your homework last night, did you?
If we (go on/ turn off/ look after/ take away)……go on………throwing garbage, the environment will be contamined.
I. Supply the correct verb form:
1. Where’s Mary? She (listen) ___is listening_______________ to a new CD in her room.
2. Don’t forget to take your umbrella with you today. You know it (be) ___is__________ the raining season now.
3. Jean always (learn) __learns________ English at this time every day but today she (not study) __isn't studying_____ at the moment.
4. What time ___does the meeting happen_________ (the meeting/ happen) tomorrow? I (not know) ________haven't known___________ it yet. I (wait) _______will wait__________ for the announcement.
5. Where ____have you lived___ (you/live) since you moved from your old house?
6. Look! The sun (rise) ____is rising______ over the ocean. This is the most amazing scene I (ever/ see) _____have ever seen_________.
7. He (speak) ____speaks_____ Japanese so well because He (come) _____comes______ from Japan.
8. _____Do you usually go___ (you/ usually/ go) for Christmas or ___Do you stay______ (you/stay) at home?
9. Look! Your friend (hold) ____is holding_______ some roses. They (look) _______look_____ lovely.
10. _______have u finished______ (you/ finish) your assignment yet? No, I ____haven't____________.
11. My father usually (walk) __walks________ to work but now he(drive) ___________is driving_______ his car.
13. My grandparents (bring) ___have brought_________ me up since I was very small.
14. How long _____has peter worked_______ (Peter/ work) in his firm?
16. I (just/ realize) ___have just realized____ that there are only four weeks to the end of them.
17. This is the second time I (be) _have been____ to London.
18. Now the children (not want) ___don't want____ to go to sleep. They (prefer) ____prefer_______ their mother to tell them bedtime stories.
20. Jim (cook) _____is _____ so tired now. He (work) _______has been working_________ non-stop since the morning
1. They (go) ___went __________ home after they (finish) _____had finished________ their work
2. The children (play) ____were playing_________ football when their mother (come) ____came_________ back
3. What (he /do) ____did he do_________ when he (be) _____waws________ young?
4. What (you/do) ____were u doing________when the phone (ring)______rang_____?
5. She (already, see) _________has already seen____ Dr. Rice. (she/ever/know) ____Has she ever known_______him?
6. We (often/ come) ___often come__________ to the stadium, but today we (watch)___are watching______the match at home.
7. He (sit) ______sits_______ in a café everyday although he (not/like) ___doesn't like_______(drink) ____drinking___ coffee.
8. They (not eat) _____won't eat________ such kind of food next week.
9. Many houses ( damage) ____were damaged__________ because of the storm last night.
10. After they (go) _____had gone________, I (sit) _____sat________ down and (rest) ______rested_______
11. Yesterday John (go) ___had gone__________ to the store before he (go) ____went_________ home
12. After taking a bath, he (go) _____went________ to bed
13. A bridge (build) ___was being built____________at this time 2 years ago.
14. If she (work) ___works_____too , she will be tired .
15. Would you like (hang out)___to hang______with me? What about (go) ___going_____ to the cinema.
16. Tom (see) _____saw________ a serious accident while he (stand) _____was standing________ at the bus stop
17. If John and I (not/get)_____didn't get______ to the theatre, they would get surprised.
18. English ( speak) ______is sopken_______ all around the world.
19. They (not/see)______haven't seen________ eachother since they (leave) __left_____school.
Bạn lưu ý lần sau đăng ít một thôi nhé
1) is listening
2) will be (không chắc vì ngăn cách bởi the)
3) learn / isn't studying
4) will the meeting happen / haven't know / have waited ( hơi khó)
5) have you lived
6) is rising / have ever seen
7) speaks / comes
8) Do you usually go / you stay
9) is holding / are looking
10) Have you finished / am working???
11) walk / is driving
12) don't think / is sleeping
13) have brought
14) has Peter worked
15) always complain / is
16) have just realized
17) have been
18) aren't wanting / prefer
19) Have they wanted / have watched
20) has been cooking / has been working
1. They (go) ______went_______ home after they (finish) _____had finished________ their work
2. The children (play) __________were playing___ football when their mother (come) _______came______ back
3. What (he /do) ______did he do_______ when he (be) ______was_______ young?
4. What (you/do) _______were you doing_____when the phone (ring)_______rang____?
5. She (already, see) ____has already seen_________ Dr. Rice. (she/ever/know) ______Has she ever known_____him?
6. We (often/ come) ______often come_______ to the stadium, but today we (watch)___are watching______the match at home.
7. He (sit) _______sits______ in a café everyday although he (not/like) ___doesn't like_______(drink) _____drinking__ coffee.
8. They (not eat) ______won't eat_______ such kind of food next week.
9. Many houses ( damage) _____were damaged_________ because of the storm last night.
10. After they (go) __________had gone___, I (sit) ______sat_______ down and (rest) _______rested______
11. Yesterday John (go) _____had gone________ to the store before he (go) ___went__________ home
12. After taking a bath, he (go) _______went______ to bed
13. A bridge (build) ________was being built________at this time 2 years ago.
14. If she (work) ___works_____too , she will be tired .
15. Would you like (hang out)___to hang out______with me? What about (go) _______going_ to the cinema.
16. Tom (see) _______saw______ a serious accident while he (stand) ___was standing__________ at the bus stop
17. If John and I (not/get)___didn't get________ to the theatre, they would get surprised.
18. English ( speak) ________is spoken_____ all around the world.
19. They (not/see)_________haven't seen_____ eachother since they (leave) ____left___school.
1. she can_____downstair_______( downstcirs ) and opened the front door.
2. whe had to wait _____out side_______( out / out side ) until the club opened.
3. come ______here_____( here at ) want to give a sumprise
4. there are many people _____outside________ ( out side ) the cinema.
5. I want to go ____upstairs _________ ( upstairs / on ) and look for some books.
PTHH: Al2O3+6HCl➝2AlCl3+3H2O(1)
a)nAl2O3=\(\dfrac{10,2}{102}\)=0,1(mol)
mHCl=\(\dfrac{5\%.219}{100\%}\)=10,95(g)
⇒nHCl=\(\dfrac{10,95}{36,5}\)=0,3(mol)
Xét tỉ lệ Al2O3:\(\dfrac{0,1}{1}\)=0,1
Xét tỉ lệ HCl:\(\dfrac{0,3}{6}\)=0,05
⇒HCl pứng hết,Al2O3 còn dư
Theo PTHH(1) ta có nAl2O3 pứng=\(\dfrac{nHCl}{6}\)=\(\dfrac{0,3}{6}\)=0,05(mol)
⇒nAl2O3 dư=nAl2O3ban đầu-nAl2O3 pứng=0,1-0,05=0,05(mol)
⇒mAl2O3 dư=0,05.102=5,1(g)
b) C%HCl=\(\dfrac{0,3.36,5}{219+10,2}\).100%=4,8%
nAlCl3=0,1(mol)
⇒C%AlCl3=\(\dfrac{0,1.136,5}{10,2+219}\).100%=6%
14 have just cleaned
15 have you had - had
16 have you been - spent - did you have - stopped
17 will you go - will go
18 will get
19 Areyou going to do - am going
20 is going to rain
21 Will - have
22 will telephone
23 will send
24 will learn
25 Are you going to do
Giúp mình với, mình cần gấp!Cảm ơn trước ạ.
\(f\left(-2\right)=3.\left(-2\right)^2-1=3.4-1=11\\ f\left(\dfrac{1}{2}\right)=3.\left(\dfrac{1}{2}\right)^2-1=3.\left(\dfrac{1}{4}\right)-1=\dfrac{3}{4}-1=-\dfrac{1}{4}\\ f\left(\dfrac{-2}{\sqrt[]{3}}\right)=3.\left(\dfrac{-2}{\sqrt[]{3}}\right)^2-1=3.\left(\dfrac{4}{3}\right)-1=4-1=3\\ f\left(a+1\right)=3.\left(a+1\right)^2-1=3.\left(a^2+2a+1\right)-1=3a^2+6a+3-1=3a^2+6a+2\)
* Give the correct tenses or verbforms:
Mary (be)___is______found of (learn)_____learning______English with native teachers.
is/learning ạ