8.　 Don’t 　　　　(吐痰) on a street.

7.　 　　　　(无论哪里) you go, I’ll go with you .

6.　 As soon as the box is opened, it 　　　　(发出) a piece of beautiful music.

5.　 Do you collect waste paper or bottles for r　　　 　.

4.　 The weather is so p　　　 　that many people go hiking to spend their holiday.

3.　 My grandpa k　　　 　a lot of flowers in his garden.

2.　 We must stop them from p　　　 　waste water into the river.

1.　 When you throw rubbish, make sure all of the rubbish goes into the d　　　 　.

10. 　　　　(冲浪) is one of the world’s most popular water sports.

Unit 3

9.　 　　　　(虽然) his grandpa is 70 years old , he is still at work.