题目内容
In the study of modern science, there are many cases _____ soldiers can teach officers.
| A.when | B.who | C.which | D.where |
D
考查定语从句。先行词为抽象的地点名词cases,且从句中不缺主语或宾语,缺少的是地点状语,所以用关系副词where,选D。
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| A.when | B.who | C.which | D.where |