题目内容：

根据句意, 用所给单词的适当形式填空。

conversation, proper, sleep, dare not, develop

1.I feel very tired and _____________ because I stayed up last night.

2.She ______________to go out at night.

3.Can you answer the difficult question________________？

4.I had a long______________with Tom yesterday

5.With the d____________ of China, all the children can go to school.