用所给动词的适当形式填空。

1. Can you help the students with________ (swim)?

2. My father________(not want) to go fishing.

3. Thank you for________(help) me.

4.What can Mary_________(do)?

5. Tom_________(paint)  pictures for his mother sometimes.

根据对项目不同方案的敏感性分析，投资者应选择()的方案实施。

A.项目盈亏平衡点高，抗风险能力适中

B.项目盈亏平衡点低，承受风险能力弱

C.项目敏感程度大，抗风险能力强

D.项目敏感程度小，抗风险能力强