Where have you___________, Mike? I have　____________ to the library with my friends.

Look! Mrs. Green is talking ____ the students of ClassⅠon the ground. [ ]

Quzhou is a beautiful city. Every year there are __________ tourists.

Mum, I’m going out with my classmate tonight. —OK. But you’d better _____ back too late.

Have a cigarette, will you ? —No, thanks. I _________ heavily, but I’ve given it up recently.