—Jim, Tom is looking for his English book. Is this ______?—No, that is______. I don’t know wherehisis.
Don’t worry about him any more. He is old enough to think ___________.
— Dad, my watch doesn’t work.— ___________ Let me see what I can do for you.
Mr. Brown said with a smile, “___________ your hands if you have any problem. ”
-Peter, don’t pick flowers in the park !-__________.A. Sorry, I won’tB. Sorry, I don’tC. It’s nothing
-We __________ play football on the busy road, it’s dangerous. -I agree with you. We should keep safe. A. needn’t B. mustn’t C. may not