1. 根据首字母提示补全单词。

1. （1） Lucy has gone to Beijing.
   

3. （2） Nick has made great p with his study this year. His parents are very happy.

5. （3） The heavy snow has prevented the c of this village with the outside world for two days.

7. （4） China has spent lots of money d science.

9. （5） Everything that he did was to s people's needs.