1. One of the boys _________(be) born in1990
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 before?--- No, she hasn’t.
10. Lingling wants _____(go) to the USA.
11. Li lei _______ (learn) 1,000 English words since last night.
12.---I ______(lose) my pen! ---Bad luck! When _____ you _____(lose) it?
--- I ______(lose) it last night.
