1.Traffic jam is one of the most common issues in big cities in the world.

2.We are interested in watching cartoons on TV.

1.replace

2.ranked

3.plastic

4.paper

5.recyclable

0.B

1.C

2.B

3.A

4.B

5.A

6.c

7.b

38.of having an umbrella, I got very wet in the rain.

39.to collect stamps.

So Tuan decides to go home quickly.

39. his racket, but this is mine.

40. swim in that polluted lake,boys.

2.am looking

3.is getting

4.are staying

5.am coming

6.is starting

7.are making/am trying

8.is happening

1.doesn't study

2.was

3.will buy

4.taught

5.saw

1.C

2.B

3.D

4.A

5.D

6.C

D đúng đó:)