We have done things we ought not to have done and undone things we ought to have done. A．leftB．leaveC．will leaveD．leaving 题目和参考答案——青夏教育精英家教网—

题目内容

We have done things we ought not to have done and_____ undone things we ought to have done.

A．left

B．leave

C．will leave

D．leaving

考查时态。句意“我们把不应该做的事情做了，反而把该做的事情给丢下了。”and后的动词是和前面的done并列的，故用left。故选A。

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