问题
选择题
You ______ do that again. It's a waste of time. [ ]
A、needn't
B、don't need
C、need to
D、needn't to
答案
答案：A
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You ______ do that again. It's a waste of time. [ ]
A、needn't
B、don't need
C、need to
D、needn't to
答案：A