问题
选择题
It's quite warm here; we __________turn the heating on yet.[ ]
A. couldn't
B. mustn't
C. needn't
D. wouldn't
答案
答案：C
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It's quite warm here; we __________turn the heating on yet.[ ]
A. couldn't
B. mustn't
C. needn't
D. wouldn't
答案：C