单词拼写。

1. He works in China  ________(福利) Institute .

2.The police ________ (观察) the man entering the bank last night .  

3.  ________ (不幸地),I missed the last bus.  

4. Let the water__________(流通),or it will go bad.

5. She has the ________ (自由) to do so.    

6. This road is about 1,000 meters in _________(长度).

7. The dumb have to communicate by ________(手势) .

8. Hard work leads to success and ________(失败)lies in laziness.

9. I _____ (克服)my dislike for maths now.

10. She was ashamed of her _____ (行为) .