【正文】
an39。t C. needn39。t have to 2. Must we clean the house now? No, you _______. A. needn39。t D. can39。t B. mustn39。t D. may not 5. Johnny, you play with the knife, you hurt yourself. A. won39。t B. mustn39。t, must D. can39。t 6. The fire spread through the hotel very quickly but everyone get out. A. had to B. would C. could D. was able to Would you go out for a walk with me? No, I . My girl friend is ing. A. wouldn39。t D. shouldn39。clock, he be there by now. A. need B. shall C. ought to D. must 10. I mailed the letter two weeks ago. She_ ____it. A. must receive B. can39。t hurry B. mustn39。t hurry D. needn39。t D. wasn39。t think you________. A. Need...must B. Do...need to C. Must...have to D. May .... ought to 15. The teacher do all the exercises, but a pupil_______. A. needn39。t....needn39。t....must 16. Would you please open the window ? Yes, I______. A. will B. would C. do D.