This old computer must have been of great use to ______did the scientific research.

分类: 作业答案 • 2021-12-28 18:17:30

问题描述：

This old computer must have been of great use to ______did the scientific research.
A those B when C whoever D whomever

答

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