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As we all know,the whole life of the doctor____studying the

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/05/04 10:41:19
As we all know,the whole life of the doctor____studying the origin of cancer
A has devoted to B was being devoted to C was devoted to Dhas been devoted to
选哪个,为什么?每个选项解释下?
选D.sb devote some time to doing sth.某人把时间奉献于做某事.
the whole life作主语 应为:some time be devoted to doing (时间被奉献于做某事)
现在用的是一般现在完成时,为some time has been devoted to doing
所以选D