I. Find the word which has a fifferent sound from others:

1. A. flood B. wood C. book D. cook

2. A. overcrowded B. house C. country D. town

3. A. health B.heat C. meat D. seat

4. A. pavement B. travel C. imagine D. transport

5. A. footprint B. shoot C. smooth D. toothache

II. Find the word which has a diferent meaning from others:

1. A.cycle B. drive C. ride D. fly

2. A. coal B. gasoline C. wind D. natural gas

3. A. plentiful B. short C. abundant D. unlimited

4. A. convenient B. confortable C. enjoyable D. difficult

5. A. save B. recycle C. converse D. waste

III. Fill in each blankets with a suitable word:

IV. Rewrite these sentences that these meanings are not changed.

=>Nick writes essays……………………………………………………

2. A snail is slower than a crab.

=>A snail moves …………………………………………………………

3. My father’s explanation about the subject was clearer than my brother’s.

=>My father explained the subject ………………………………………

4. MY cousin is a better singer than I’am.

=>My cousin sings……………………………………………………….

5. Phong is a faster swimmer than Phuc.

=>Phong swims………………………………………………………….

V. Choose the best answer.

1. Driverless cars have already ……….., they look so cool.

A. exist B. existed C. existing D. been existing

2. Turn ………….the lights when you learn at night.

A. off B. on C. in D. of

A. to reduce B. reducing C. reduce D. how to reduce

3. This camera is………...

A. her B. his C. my D. Nam

4. What ………….we do if the environment is polluted?

A. will B. would C. could D. all are correct

5. People won’t use flying car ………….the year 2050.

A. during B. on C. until D. at

6. We should use………….to protect the environment.

A. solar energy B. wind energy C. biogas D. all are correct

7. If we cut to much trees, What…………..?

A. happens B. will happen C. will happens D. none are right

8. The car is so clean. My father …………….

A. is cleaning B. has cleaned C. has cleaning D. cleaned

9. Stop! They……………

A. are playing B. play C. were playing D. all are correct

10. When you see the red light, you………..go.

A. can B. can’t C. must D. mustn’t

VI. Make questions for the underlined part:

=>…………………………………………………………………………………………….

2. People in this area use solar panels to produce evergy.

=>…………………………………………………………………………………………….

3. We learn to reuse some daily products like empty bottles to save money.

=>……………………………………………………………………………………………..

4. People from the countryside move to city to find work and a better standard of living.

=>…………………………………………………………………………………………….

5. People like using urban transport pods because they are very convenient and safe.

=>……………………………………………………………………………………………..

VII. Complete these sentences to have a meaningful sentence:

=>………………………………………………………………………………………………………

2. at present/most/out electricity/come/use/coal,gas, oil and nuclear power.

=>……………………………………………………………………………………………………..

3. This power/could/provide/sun.

=>……………………………………………………………………………………………………..

4. one percent/solar evergy/reach/earth/enough/provide power/the total population.

=>……………………………………………………………………………………………………..

5. Many country/already/use/solar energy.

=>…………………………………………………………………………………………………….

6. On/cloudy/you/use/solar energy/too.

=>……………………………………………………………………………………………………..

7. Car/use/solar enegy/future.

=>……………………………………………………………………………………………………..

8. If/we/play/guitar/we/study better.

=>…………………………………………………………………………………………………….

9. Nice/meet/Nick./how/you?

=>…………………………………………………………………………………………………….

10. What colour/your/books?/they/green.

=>…………………………………………………………………………………………………….

VIII. Write a short paragraph to describe your dream house in the future.

…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

a. Cho P(x)=0

=>2x-7+(x-14)=0

=>2x-7+x-14=0

=>3x-21=0

=>3x=21

=>x=7

Vậy x=7 là nghiệm của P(x)

b. Cho Q(x)=0

=>x^2-64=0

=>x^2=64

=>x=8 hoặc x=-8

Vậy x=8 và x=-8 là nghiệm của đa thức Q(x)

a. Ta có: tgABM=tgECM(c-g-c)

b. Ta có: B= BCE(tgABM=tgECM)

=>CE vuông góc với BC

c. Tg ABC(B=90) có: AC>AB(t/c giữa cạnh và góc đôi diện)

Mà AB=CE(tgABM=tgECM)

=>AC>CE

d. Ta có: tgAMC=tgEMB(c-g-c)

=> CAM=BEM

Mà CAM và BEM nằm ở vị trí so le trong

=>AC//BE.

(Hình bạn tự vẽ nha)

theo bài ra ta có:

p1=2k+1(k thuộc z)

p2=2k+3(k thuộc z)

=>p1+p2=4k+4=2n

4(k+1)=2n

2(k+1)=n

từ đây ta thấy n chia hết  cho 2 và k+1

vậy n là hợp số

1. rises/ is rising

2. will go

4. doesn't rain

5. to arrive/ will have

16. is going to rain

17. didn't invite/ forgot

18. is coming/ has

19. playing/hate

20. talking/ am trying to finish

21. to give up smoking

22. working/ finishing

23. were

24. have...known/ have known

25. Has...bitten/ bit

Fishing is my favourite pastime.

Cho hàm số y=f(x) có đạo hàm trên (a;b). Phát biểu nào sau đây sai?

A. Hàm số y=f(x) nghịch biến trên khoảng a ; b  khi và chỉ khi  f ' x ≤ 0 , ∀ x ∈ a ; b . 

B. Hàm số y=f(x) nghịch biến trên khoảng (a;b) khi và chỉ khi f ' x ≤ 0 , ∀ x ∈ a ; b  và f ' ( x ) = 0  tại hữu hạn giá trị x ∈ a ; b  .

C. Hàm số y = f x  nghịch biến trên khoảng a ; b khi và chỉ khi :  x 1 > x 2 ⇔ f x 1 < f x 2   .

D. Nếu f ' x < 0 , ∀ x ∈ a ; b   thì hàm số y=f x  nghịch biến trên khoảng (a;b).