1, is => are

2. enough comfortable => comfortable enough

3. improvement => improved

4. An understand => An understanding

1.      She is too young to drive a car.

A.    She isn’t young enough to drive a car.

B.     She is old enough to drive a car.

C.     She isn’t old enough to drive a car.

D.    She is young enough to drive a car.

2.      They intend to buy a new car.

A.    They are intend to buy a new car. 

B.     They are going to buy a new car. 

C.     They are going buy a new car. 

D.    They were going to buy a new car. 

1. D

2. C

3. B

4. D

5. A

6. B

7. C

1, there is

2, there are

3, there are

4, there is

5, there is

6, there are

7, there is

8, there are

9, there is

10, there are

1.      was not / to be / She / in my class / old enough

A.    She in my class was not old enough to be

B.     She was not old enough to be in my class

C.     She to be in my class was not old enough

D.    She was not enough old to be in my class

2.      on the right side / There is / of the room / a bookshelf.

A.    There is on the right side a bookshelf of the room

B.     On the right side of the room there is a bookshelf

C.     On the right side there is a bookshelf of the room

D.    There is a bookshelf on the right side of the room

1. I wish they weren't in HCM City now. 

2. She wishes she brought her umbrella.

3. They wish there wasn't a lot of garbage in the river in their neighborhood.

4. He wishes his printer worked properly.

4. she was there to join the camp held by the Y & Y.

5, they moved the chair for her.

6. he was tall enough to reach the top of the bookshelf.

7. I had enough money to buy that E-bike.

8. she didn't get up late in the morning.

1. would visit

2. if I knew

3. not to go out

4. I came

5. told me 

19. would do

20. told

21. were

22. goes

23. arrived

24. had been

25. had been born 

9, Let me look after your cat, shall you?

10. May I help you?

11. Huong cared for her dog.