题目内容
Sheldon could have defeated Howard in the match, but he _______ too careless at the last minute.
| A．is | B．was |
| C．has been | D．had been |
B
解析试题分析：句意：谢尔顿本可以在比赛中打败霍华德的，但是他却在最后一分钟掉以轻心了。由could have defeated可知道是对过去的推测，所以用过去时。故B正确
考点：考查时态
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| A．see | B．was seeing |
| C．will have seen | D．will be seeing |
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| C．are trying | D．will try |
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| A．finished | B．finishing |
| C．having finished | D．was finished |
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| A．shoulders | B．shouldered |
| C．is shouldering | D．has been shouldering |
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| C．will increasingly feel | D．is increasingly feeling |
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| C．prepare | D．will prepare |