The great scientist became world-known in the early 1970s,______ he and another scientist made new d

题目简介

The great scientist became world-known in the early 1970s,______ he and another scientist made new d

题目详情

The great scientist became world-known in the early 1970s,______ he and another scientist made new discoveries about black holes.
A.whichB.whereC.whenD.then
题型:单选题难度:偏易来源:不详

答案

C
考查定语从句。先行词是时间,引导词在从句中作时间状语。

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