Is Sam an student —Yes, he is _______.

The lift in that tall building went wrongand got trapped _____ floors. People in it had no way to get out.

Alice, you are going shopping this afternoon, aren’t you? Anything special in your mind?—Nothing ________. I just haven’t done shopping for a long time.

Thosewho_________singingmayjoinus.

Peter’s jacket looked just the same as Jack’s, but it cost ____his.