用所给词的适当形式填空。

1. I think that he _____ (arrive) tomorrow.

2. Michael is a _____ (Canada) boy.

3. What about _____ (buy) a sandwich for him?

4. The _____ (child) parents have to make desks and chairs for them.

5. How _____ (surprise) when he saw his bag back.

6. An egg is much _____ (healthy) than a bag of potato chips.

7. Daniel introduced _____ (he) in the letter.

8. Let's _____ (help) him to make it successful.

9. My brother is _____ (interest) in basketball.

10. Do you think the man need _____ (see) a doctor?

不适于分离柯萨奇病毒的标本是（）

A.血液

B.尿液

C.粪便

D.咽拭子

E.脑脊液