用括号内动词的适当形式填空。

1. One of the boys ______ (be) born in 1990?

2. Mr Wang ______ (enter)a competition before?

3. ______ you ever ______ (write) to your friend in English?

4.  My brother______ (not visit) the Great Wall last year?

5. Tom ______ (not go) to the zoo, will he?

6. I ______ just______ (finish) my homework.?

7. The boy ______ (stay) at home last night.?

8. The man ______ (be) 40 years old now.He ______ (be) in Tianjin for 20 years?

9.—Sally ______ (visit) China?

    —No, hasn't?

10. Lingling wants ______  (go) to the USA.

斗谱编排中宜放于斗架最下层的大斗内的有（）

A.通草

B.甘草

C.白芷

D.桑叶