问题描述:
mike,you have a cold and you_____ go out.its very cold outside
A.not had better.B.had not better
C.had better not.D.had better
为什么这里用had过去式了?
A.not had better.B.had not better
C.had better not.D.had better
为什么这里用had过去式了?
问题解答:
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