11. 打扫，横扫　　　　　　　　　　 12. 对做某事忐忑不安

9. mix …with…　　　　　　　　　　 10. in all directions

7. require sb. to do sth.　　　　　　　　 8.be based on

5. disturb sb　　　　　　　　　　　　 6. from side to side

3. in a whisper/whispers　　　　　　 　　4. wave about

1. be lacking in　　　　　　　　　 2. assist in　

15.　 You can travel at your local travel a_______.

14.　 The river is 300 miles in l_________.

13.　 She is not o_________ about the future, because she always sighs.

12.　 The government used the press as a __________ (工具) for its propaganda.