Excuse me, is there ____ book by Mo Yan?—Yes, it’s on _____ bookshelf over there.

I think your mother is_____you at the school gate at the moment.

Is this your earser?—No,it isn’t. It’s ________.

Listen! Is Mary singing in the next room?—No. It _______ be Mary．She has gone to Shanghai for an important meeting.

Do you know the boy ________ is sitting next to Jim? Yes. He is Jim’s friend. They are celebrating his ________ birthday.