As we all know,the whole life of the doctor___studying the origin of cancer
题目
As we all know,the whole life of the doctor___studying the origin of cancer
A has devoted
B was being devoted to
C was devoted to
D has been devoted to
答案
D.是整个生命被投入到研究癌症上面去,所以用被动语态.而且是已经被投入,用完成时.
举一反三
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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