I-1.C;2.A;3.B;4.D;5.A

II-

1.in

2.to lift

3.since

4.friends

5.listening

6.why

7.herself

8.do

9.larger

10.go

III-

1.playing

2.has worked

3.are doing

4.are going to go/will go

5.walks

V-

1.My father used to smoke a lot two years ago.

2.Hoa bought a new hat last week

3.Tuan likes cooking meals and hates washing up.

4.Kitchen is the dangerous place for children to play.

Chúc bn học tốt nha ^^

I/

1. C

2. A

3. B

4. D

5. A

II/

1. in

2. to lift

3. since

4. friends

5. listening

6. why

7. herself

8. do

9. larger

10. go

III/

1. playing

2. has worked

3. are doing

4. are going to go / will go

5. walks

V/

1. My father used to smoke a lot two years ago.

2. Hoa bought a new hat last week.

3. Tuan likes cooking meals and hates washing up.

4. Kitchen is the dangerous place for children to play.