题目内容
16．Must we finish the task by 5p．m．tomorrow？（做否定回答）No，youneedn't．
分析 ---我们必须明天五点之前完成任务吗？
----不，不需要．
解答 答案：No，needn't．must引起的一般疑问句，否定回答用you needn't或者you don't have to，mustn't表示禁止．故答案是No，needn't．
点评 need开头的话 肯定回答：Yes，you need．否定回答：No，you needn't．
must开头的话 肯定回答：Yes，you must（表示这是必须得做的，不容推辞）．否定回答：No，you needn't．（表示这是可以不做，态度较委婉）
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A．A four-year-old child．
B．A ten-year-old child．
C．A sixteen-year-old child．
D．A five-year-old child．
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A．a cook
B．a library assistant
C．a nurse
D．a PE teacher
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A．Chinese food
B．Western food
C．Chinese and Western food
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B．The library assistant．
C．The PE teacher．
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B．He must be healthy and strong．
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