【题目】Since nobody gave him any help, he ______ have done the research on his own．
A．canB．mustC．wouldD．need
在线课程【答案】B
【解析】本题考查情态动词。句意：既然没人给过他任何帮助，他肯定是独自完成了这项研究。根据Since引导的从句“既然没人给过他任何帮助”可以肯定推断出他“一定是”自己独立完成研究的。选B。
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Since nobody gave him any help, he have done the research on his own．A．canB．mustC．wouldD．need
编辑：chaxungu时间：2026-04-27 03:01:22分类：高中英语题库
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