_________ did you do with old books?— I sent them to children in poor areas.

I lent my bike to Li Lei. May I ____________ yours, Mary?－ Certainly. Here is the key.

You mustn’t stay __________ late every day. It’s bad for your health.[ ]

.______ pressure the U.S. government put on the Chinese government, China would stick to its own policy of exchange rate.

Excuse me, could you tell me _______?—Sorry, sir. I wasn’t there at that time.