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.

伸肘关节的肌为 ()

A．肱二头肌

B．肱三头肌

C．三角肌

D．肱肌