What a pity! Considering his ability and experience, he______better.

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问题 What a pity! Considering his ability and experience, he______better.

选项 A、need have done
B、must have done
C、can have done
D、might have done

答案D

解析本题考查虚拟语气中情态动词的用法。need have done，本来有必要做(而没做)；must have done是对过去发生的事情的肯定推测，表示“过去一定做了”；can have done是对过去发生的事情的不肯定推测；might have done，表示“本来可以做(而没做)”。

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成人本科学位英语

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What a pity! Considering his ability and experience, he______better.

成人本科学位英语

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Notlongago,Ihadmyfirston-linechat.Ithoughtitwouldbe【C1】becauseIhaveheardsomanypeople【C2】itintha

WeallknowthatDNAhastheabilitytoidentifyindividualsbut,becauseitisinherited,therearealsoregionsoftheDNAstr

______athisknowledge,allthestudentsshowedtheirrespecttotheirteacher.

Thebuildingaroundthecornercaughtfirelastnight.Thepolicearenow______thematter.

Intheyear2100,theworldisgoingtohaveapopulationofabout8billion.Mostscientistsagreethatthemostsevereproblem

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对于极微量的靶序列的扩增可以采用的PCR技术是

(2009年)在静电场中，有一个带电体在电场力的作用下移动，由此所做的功的能量来源是()。

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