This old computer must have been of great use to ______did the scientific research.
题目
This old computer must have been of great use to ______did the scientific research.
A those B when C whoever D whomever
答案
C
宾语从句
从句缺少主语
所以是Whoever
也可以用 those who 定语从句
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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