—What a nice camera!—Yeah. It _______ Beijing.
A: Hey, man. You can’t cross the street now. You have to wait _____ the traffic lights turn green.B: Oh, sorry and thank you.
A: Have you got any books on computers? I want to borrow _______.B: Yes, Here you are, but you must return _____ by Friday.
They got married ____ 2010. That means they have been married _____ 2010.
I think the place has changed ______ over the last years.
A: _____ do you know the book on the left?B: I know it very well.