________ more careful, the work might have been done better.A．BeingB．Having been
题型：不详难度：来源：
________ more careful, the work might have been done better.| A．Being | B．Having been | | C．If you had been | D．To have been |
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答案
| C |
解析
| 考查if 的过去虚拟句。 If 后用had done, 主句用情态动词+have done |
举一反三
_______ your diet, it is easy to reduce.| A．Watching | B．To be watching | | C．If you watch | D．To have watched |
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_______ a pair of compasses, it is easy to describe a circle.| A．Having | B．To have had | | C．If you have | D．if having |
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______ for something, a receipt is given to you.| A．Paying | B．Having paid | | C．When you have paid | D．To be paying |
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_______ the sun rising slowly in the east, the scene is a perfect dream.| A．Seeing | B．To be seeing | | C．When you see | D．Having seen |
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. She asked me ________ the film the day before.| A．if I have seen | B．whether I have seen | | C．whether I had seen | D．if had I seen |
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