Not until some students failed in the exam _____ how much time they had wasted.A

题干

Not until some students failed in the exam _____ how much time they had wasted.

A．didn’t they realize	B．did they realize
C．they didn’t realize	D．they realize

上一题下一题 0.85难度单项选择更新时间:2010-06-06 07:13:53

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