________ more careful, the work might have been done better.A．BeingB．Having been_刷题宝

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________ more careful, the work might have been done better.

A．Being	B．Having been
C．If you had been	D．To have been

上一题下一题 0.85难度单项选择更新时间:2010-06-20 08:49:24

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