用所给词的正确形式填空。

1. I go home _____(one) a week. 

2. There are the _____(key) to these doors.

3. I would like to make friends with an _____(interview).

4. I _____(do) some reading tomorrow.

5. Tom usually _____(get) up at 8:00 on Sunday.

6. Where _____(do) Maria go on vacation?

是将药物通过水洗或漂去杂质，达到洁净目的（）

A.挑选

B.筛除

C.筛选

D.风选

E.水选