问题
选择题
— ____ we go to help him with his work?
—No, you needn’t. He ____ finish it all by himself.
A. Must; can’t B. May; can C. Must; can
答案
答案：C
must表示“必须”，用must提问时，其否定回答用needn’t。can表示“可以，能够”。
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