问题补充:
— Must we finish all the exercises today?
— No, you .You can finish them within two days.
A. mustn’t
B. needn’t to
C. needn’t
D. don’t have
答案:
A. mustn’t
B. needn’t to
(答案→)C. needn’t
D. don’t have
解析:句意:我们必须今天完成所有的练习吗?must的否定回答不用mustn’t,一般要借助于needn’t或者don’t have to。通过分析只有选项符合要求,故选C。
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