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9。t B. needn39。tC. don39。t have to D. don39。t need to( ) 3 Must I do my homework at once?No, you___. A. needn39。t B. mustn39。t C. can39。t D. may not4( ) 1 His arm is all right. He___ go and see the doctor.A. has not to B. don39。t have toC. haven39。t to D. doesn39。t have to( ) 2 He had to give up the plan, ___ he?A. did B. didn39。t C. does D. doesn39。t( ) 3 They had to walk here, ___ they?A. mustn39。t B. did C. didn39。t D. hadn39。t5( ) 1 He had better stay here, ___ he?A. didn39。t B. don39。t C. hadn39。t D. isn39。t( ) 2 You39。d better___late next time.A. not to be B. not be C. won39。t b