六里中学九年级英语周练(Unit5) 一、单项选择 ( )1. --- Can you swim in the river? --- No, I _____. A. mustn’t B. may not C. can’t D. needn’t ( )2. --- May I go swimming now? --- No, you ______. You must finish your homework first. A. mustn’t B. may not C. couldn’t D. needn’t ( )3. --- Excuse me. Where is the zoo? --- Sorry, I don’t know. Ask that policeman. He _____ know. A. shall B. may C. need D. would ( )4. ---_______ I finish the work today?