(2013·吉林四校高三一诊)I really don"t know how to thank you, but for your help, I ______
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(2013·吉林四校高三一诊)I really don"t know how to thank you, but for your help, I ________ my lost necklace.| A．couldn"t have found | B．mustn"t have found | | C．couldn"t find | D．wouldn"t find |
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答案
| A |
解析
| A 句意：我真的不知道该怎样感谢你，没有你的帮助，我不可能找到我丢失的项链。couldn"t have done表示对过去情况的否定推测，意为“不可能”。 |
举一反三
(2013·东北三校4月二次联考)No matter how healthy you ________ be, you need to consult a doctor from time to time.| A．should | B．will | C．must | D．may |
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We ________ jump to conclusions before we have all the facts.| A．couldn"t | B．mightn"t | C．shouldn"t | D．mustn"t |
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| You surprise me! You ________ fall asleep in such an important meeting. |
You ________ pay too much attention to your reading skill, as it is so important.| A．can"t | B．shouldn"t | C．mustn"t | D．needn"t |
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(2013·北京高考)If we ________ a table earlier, we wouldn"t be standing here in a queue.| A．have booked | B．booked | | C．book | D．had booked |
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