—______ have you been learning English?—Since seven years ago．

— _________ did you do with old books?— I sent them to children in poor areas.

---Who__________ English last term?---Mr. Wu did.

All of us found ________ hard to get along with him, he was too strict with others but not with himself. 

—How long does it take to get to the airport?—Forty minutes. But it’s foggy today. I’m not sure          the highway will closes soon. Let’s set off earlier.