難度:★ 考點(diǎn):情態(tài)動(dòng)詞
	  1. -Mom, must I clean my room now?
	
	 。璑o, you          . You can do it tomorrow.
	
	  A. can't             B. needn't             C. mustn't          D. shouldn't
	
	  2. You____________  worry about me. I feel much better now.
	
	  A. mustn't      B. can't                  C. needn't             D. won't
	
	  3.You ________ stop when the traffic light turns red.
	
	  A. can           B. had better         C. need            D. must
	
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