用括号内动词的适当形式填空
One of the boys        (be)born in 1990.
Mr Wang       (enter)a competition before.
      you ever        (write) to your friend in English?
My brother     (not visit)the Great Wall last year.
Tom      (not go) to the zoo,will he?
I        just (finish) my homework.
The boy      (stay) at home last night.
The man       (be) 40 years old now.He      (be)in Tianjin for 20 years.
—Sally      (visit) China?—No,hasn’t.
Lingling wants       (go) to the USA.