She is a nurse. She works _________ a hospital.[ ]

Li Na plays __________ tennis very well. She has become __________ first Asian woman toreach a Grand Slam（大满贯）final.

Here’s a recipe ______ a pizza. [ ]

Can you tell me ______ ?—Yeaterday afternoon.

You had better ____ jeans. If you don’t, we won’t let you in.