You______him ont though you were very busy.

admin2009-08-15  19

问题 You______him ont though you were very busy.

选项 A、should have helped
B、must help
C、ought to help
D、could have helped

答案A

解析 句意:你本应该帮助他离开的,尽管你很忙。[A] should have helped表示你本应该做某事(但实际你没做),最符合题意。
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