用括号中所给词的适当形式填空。

1. My mother can                 (dance).

2. Miss Li is our English teacher, we all like               (she).

3. —What're these?    

    —They're                (foot).

4. There                (be) a bird in the tree.

5. His father is forty                (year) old.

为作用强而迅速的止泻药物（）

A．胃蛋白酶 

B．多潘立酮 

C．硫酸镁 

D．地芬诺酯 

E．去氢胆酸