I.

1.playing

2.but

3.because

4.sitting

5.games

II.

1.The internet changes the way we communicate

2.I send emails to my pen pal in australia 

3.Do you think spending too much time on the internet is harmful

4.what are the positive and negative sides of the internet ?

5.internet is useful but it is also a dangerous place

III.

1.He spends all his free time looking after his garden

2.He prefers listening to pop music to watching TV after school

3.It’s very interesting to make crafts or collect things like stamps and coins

4.We enjoy visiting museums when we have leisure time

5.I hate getting up early and preparing breakfast in the cold winter days

6.Vinh really enjoys hanging out with his friends

7.It is very interesting to play beach games

8.It's better to avoid speding too much time on computer games.

9. My parents wants me to learn something interesting

10.Jenny dislikes reading poetry boring

IV.

1,B

2,D

3.A

4.B

5.C

6.A

7.D

8.B

9.C

10.A