一、单选题。
1.Where are the boy students? They _____ to the school factory.
A. have been B. have gone C. went
2.Is your father in? No, he ___ _ to Shenzhen.
Has he ever been there before ? Yes, he ___ there several times
A. has been, has gone B. has gone, has been C. has gone, has gone.
3.He asked me if I___ _ to Hangzhou before. I told him that I wanted to go there for a visit as I __ __ never _ ___ to that city before.
