◎ 题干
Since nobody gave him any help,he ________ have done the research on his own.
A.can B.must
C.would D.need
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“Since nobody gave him any help,he ________ have done the research on his own.(2013·大纲全国,26)A.canB.mustC.wouldD.need…”主要考查了你对  【情态动词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。