Question

【题目】This was a time _________ the two countries were at war.

A. where B. which C. when D. that

Answer 1

【答案】C

【解析】考查定语从句。句意：这是一个两国正在交战的时期。句中包含定语从句，先行词是time在定语从句中做状语，用关系副词when，故选C。