1.People are advised to …………smoking because of its harm to their health.
A.turn up B.come up C. look forward to D.cut down on
2…………….all our careful plans, a lot of things went wrong.
A.Although B. Because of C. Despite D.Due to
3.There is little sugar left in the jar, so we don’t have ………to make sweet cakes.
A.sugar enough B. much sugar C. enough sugar D.lots of sugar
4.Tom: “Would you mind If I sat here?”
Mary: “………………………..”
A. No. Of course not B. Ok C. All right D. Please do
5.As I stepped onto the bus, I noticed I ………………. my wallet at home.
A.left B. had left C. have left D.was leaving
6.Son:“I promise I won’t talk in the class” - Mom : ………………………..Tài liệu cô Lương
A.A good idea B. I hope so C.It’s my pleasure D.I don’t mind
7.The boy …………..next to Nam comes from Vinh University.
A. is standing B. standing C. stood D. having stood
8.Unless we plant more trees around the school, we ……..more shade to play.
A.won’t have B. will have C.don’t have D.wouldn’t have
9.He has owned lots of coin and stamp …………… since 2015, hasn’t he?
A.collect B. collectors C.collecting D.collections
10."I will come here with some of my friends tomorrow” The girl said
A.The girl said she would come here with some of her friends the next day
B. The girl said she would come here with some of my friends the next day
C. The girl said she would come here with some of her friends the following day
D. The girl said she would come there with some of her friends the following day
11.Of all the national parks in the United States, Yellowstone is……………visited.
A. one of the most B. of the most C. one most D. the most one
12.This job requires certain…………..You have to be good at operating computer and dealing with
people.
A. qualifications B. skills C. techniques D. knowledge
13.We’ve run ……………..sugar. Could you buy some more?
A. after B. off C. out of D. away
14.The medical community continues to make progress in the fight against cancer.
A. speed B. expectation C. improvement D. treatment
15.He doesn’t want ……. at by his classmates whenever he has an incorrect answer.
A.laugh B. to laugh C.to be laughed D.being laughed

(Unit 13)

1.A.watch  B.come C.ride  D.free                   2.A.programmes   B.like  C.do  D.clean

3.A.your   B.his   C.their  D.she                          4.A.it      B.my        C.our    D.her

5.A.often  B.sometimes  C.time  D.always      6.A.about   B.in  C.of   D.and

7.A.why   B.what   C.how  D. the                    8.A.surf    B.doing   C.ask  D. dance

9.A. answer  B.play  C.there  D.sing               10.A.club   B.park   C.world  D.go

11.A.twice  B.once  C.three times   D.how     12.A.karate   B.internet  C.play   D.cinema

13.A.tick    B.repeat    C. point     D.Let’s      14.A.questions     B.sports   C. garden   D.games

15.A.TV  B.cartoons  C.house  D.camp   16.A.go fishing  B.go camping  C.go swimming D.skate

17.A.father   B.mother     C.brother  D.grandpa   18.A.everyday    B.sometimes  C.now   D.often

19.A.sure   B.with     C.on    D.with               20.A.works   B.goes  C.cleans   D.play

21.A.does    B.watch   C.go     D.surf            22.A.shopping   B.fishing    C.evening     D.hiking

23. A.forest    B.river   C.world    D.return    24.A.weekend    B. day      C.late      D.month

25. A.like    B.hate    C. love    D. enjoy        26.A.interview    B.understand    C. by   D.draw

(Unit 14)

1.A.first   B.story  C.then   D.next                      2.A.ordered   B.happened  C.did  D.live

3.watermelons    B.seeks   C.island   D.apples    4.A.delicious     B.feel   C.lucky  D.magic

5.A.was  B.were  C.did  D.do                              6.A.let   B.read   C.put   D.got

7.A.one day    B.in the end   C. then  D. this      8.A.of    B.on  C.and  D. for

9.A.have  B.called  C.found  D.grew                10.A.gave    B.exchanged   C.lived   D.visited

11.A.heard  B.let  C.found   D.married     12.A.met   B.had  C.ate   D.run

13.A.got    B.answer   C.said    D.could    14.A. can      B.dance  C.grew   D.go

15.A.princess  B.king C.once upon a time  D.prince   16.A.beautiful  B.happily  C.far D.kind

17.A.surprised   B.married     C.tired  D.felt   18.A.yesterday    B.ago  C.last week   D.everyday

19.A.castle   B.house     C.live   D.island               20.A.after   B.before  C.ever   D.really

21.A.handsome   B.pretty  C.nice  D.bad     22.A.greedy   B.intelligent  C.hardworking  D.think

23. A.so    B.very   C.really    D.golden     24.A.don’t    B.can’t      C.didn’t      D.shouldn’t

25.A.of  B.from C.character  D.about  26.A.snow white  B.the mouse  C.the older brother  D.kind

27. A.which   B.why    C.starfruit   D.what     28.A.taller    B. best    C.younger    D. older

29. A.fox       B.crow   C.mouse      D.meat     30.A.became   B.stood   C.met   D. thank

31.A. hungry    B. thirsty    C.food   D. full      32.A.queen     B. king    C . prince   D.kingdom

33. A.shook  B.asked    C.dropped  D.picked   34.A.hobby  B. favourite C.interesting D.delicious

35.A.wise    B.clever    C. intelligent   D.stupid   36.A.folk tale   B.honest   C.greedy   D. wise

Câu 19. Điều kiện: \(3-x\ne0\Leftrightarrow x\ne3\)

\(\dfrac{x^2+mx+2}{3-x}=2m+6\)

\(\Rightarrow x^2+mx+2=\left(2m+6\right)\left(3-x\right)\)

\(\Leftrightarrow x^2+mx+2=6m-2mx+18-6x\)

\(\Leftrightarrow x^2+3mx+6x-6m-16=0\)

\(\Leftrightarrow x^2+3\left(m+2\right)x-6m-16=0\) (*)

Coi phương trình (*) là phương trình bậc hai ẩn x, tham số m, ta có:

\(\Delta=\left[3\left(m+2\right)\right]^2+4\left(6m+16\right)\)

\(=9\left(m^2+4m+4\right)+24m+64\)

\(=9m^2+36m+36+24m+64\)

\(=9m^2+60m+100\)

Nhận thấy: \(\Delta=9m^2+60m+100=\left(3m+10\right)^2\ge0\) nên ta chỉ xét 2 trường hợp.

Trường hợp 1: \(m=-\dfrac{10}{3},\) khi đó phương trình có một nghiệm là: \(x=\dfrac{-3m-6}{2}\)

Trường hợp 2: \(m\ne-\dfrac{10}{3},\) khi đó phương trình có hai nghiệm phân biệt là: \(\left[{}\begin{matrix}x=2\\x=-3m-8\end{matrix}\right.\)

Câu 20. Điều kiện: \(x^2-1\ne0\Leftrightarrow\left\{{}\begin{matrix}x\ne1\\x\ne-1\end{matrix}\right.\)

\(\dfrac{x^2+mx+2}{x^2-1}=1\)

\(\Rightarrow x^2+mx+2=x^2-1\)

\(\Leftrightarrow mx+3=0\)

Điều kiện phương trình vô nghiệm là: \(m=0\)

1. D
2. D
3. C
4. D
5. D
6. C
7. A
8. B
9. C

Với \(x\ge0,\) \(x\ne4,\) ta có:

\(\dfrac{x}{x-4}-\dfrac{\sqrt{x}+3}{x+\sqrt{x}-6}\)

\(=\dfrac{x}{\left(\sqrt{x}-2\right)\left(\sqrt{x}+2\right)}-\dfrac{\sqrt{x}+3}{\left(x-2\sqrt{x}\right)+\left(3\sqrt{x}-6\right)}\)

\(=\dfrac{x}{\left(\sqrt{x}-2\right)\left(\sqrt{x}+2\right)}-\dfrac{\sqrt{x}+3}{\sqrt{x}\left(\sqrt{x}-2\right)+3\left(\sqrt{x}-2\right)}\)

\(=\dfrac{x}{\left(\sqrt{x}-2\right)\left(\sqrt{x}+2\right)}-\dfrac{\sqrt{x}+3}{\left(\sqrt{x}+3\right)\left(\sqrt{x}-2\right)}\)

\(=\dfrac{x}{\left(\sqrt{x}-2\right)\left(\sqrt{x}+2\right)}-\dfrac{1}{\sqrt{x}-2}\)

\(=\dfrac{x-\left(\sqrt{x}+2\right)}{\left(\sqrt{x}-2\right)\left(\sqrt{x}+2\right)}\)

\(=\dfrac{x-\sqrt{x}-2}{\left(\sqrt{x}-2\right)\left(\sqrt{x}+2\right)}\)

\(=\dfrac{\left(x-2\sqrt{x}\right)+\left(\sqrt{x}-2\right)}{\left(\sqrt{x}-2\right)\left(\sqrt{x}+2\right)}\)

\(=\dfrac{\sqrt{x}\left(\sqrt{x}-2\right)+\left(\sqrt{x}-2\right)}{\left(\sqrt{x}-2\right)\left(\sqrt{x}+2\right)}\)

\(=\dfrac{\left(\sqrt{x}-2\right)\left(\sqrt{x}+1\right)}{\left(\sqrt{x}-2\right)\left(\sqrt{x}+2\right)}\)

\(=\dfrac{\sqrt{x}+1}{\sqrt{x}+2}\)

1. I am interested in learning English.

Giải thích: be interested in doing sth: quan tâm làm gì đó

2. These exercises must be finished on time.

Giải thích: Câu bị động với must

Passage 3:

1. C. using

2. A. with

3. D. famous

4. B. username

5. B. show

6. C. because

Passage 4:

1. C. valuable

2. B. to share

3. A. and

4. B. which

5. B. traits

6. C. their

1. What are you going to do next weekend?
2. There was a large round wooden table in the kitchen.
3. We didn’t have enough money to buy that car.
4. I strongly believe that friends play an important role in our life.
5. Children spend more time playing video games than reading books nowadays.
6. Although we have quite different characters, we are very close friends.
7. His instructions weren't clear enough  to understand for me.
8. Generosity is part of the American character.
9. I would like to study abroad but I don't have enough money.
10. She is wearing a pretty long new green dress.
11. He spends his free time doing volunteer work at a local orphanage near his house.
12. Of all my friends, Peter and Jack are the ones I spend most of my time with.

1. What are you going to do next weekend?
2. There was a large round wooden table in the kitchen.
3. We didn’t have enough money to buy that car.
4. I strongly believe that friends play an important role in our life.
5. Children spend more time playing video games than reading books nowadays.
6. Although we have quite different characters, we are very close friends.
7. His instructions weren't clear enough  to understand for me.
8. Generosity is part of the American character.
9. I would like to study abroad but I don't have enough money.
10. She is wearing a pretty long new green dress.
11. He spends his free time doing volunteer work at a local orphanage near his house.
12. Of all my friends, Peter and Jack are the ones I spend most of my time with.

1. What are you going to do next weekend?
2. There was a large round wooden table in the kitchen.
3. We didn’t have enough money to buy that car.
4. I strongly believe that friends play an important role in our life.
5. Children spend more time playing video games than reading books nowadays.
6. Although we have quite different characters, we are very close friends.
7. His instructions weren't clear enough  to understand for me.
8. Generosity is part of the American character.
9. I would like to study abroad but I don't have enough money.
10. She is wearing a pretty long new green dress.
11. He spends his free time doing volunteer work at a local orphanage near his house.
12. Of all my friends, Peter and Jack are the ones I spend most of my time with.