（)could have been more annoying.

You should have been more patient ________ 怎么选择

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【C17】A．must have beenB．may have beenC．could have beenD．should have been

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Women have long been more in number than men on college campuses. They also hold more adva

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With a little more patience, you （) the job better.A、could doB、would doC、could have done

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Large-scale hydroelectric power stations have been playing a more and more important part

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Lucan could have been killed because people______

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more attention the tree could have grown better.A.GivenB.To giveC.GivingD.Having given

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