会计凭证是记录经济业务、______的书面证明，是______的依据。

根据首字母提示完成下列句子。

1. Our country has set up a lot of m_            research to study the flu of HINI.

2. The pop singer felt proud when she saw many l_            coming to her.

3. Our new head teacher is a k              man in computer programs.

4. You must be careful when you swim in this d_            river.

5. The little girl was crying when she saw her room b_         _ quickly.