We went through a period _______ communications were ver Wap版

试题详情及答案解析

We went through a period _______ communications were very difficult in the rural area.

A．which

B．whose

C．that

D．when

答案：D

试题分析：考查定语从句的用法。Period后面的定语从句中缺少时间状语，要用when,而此题中没有when,所以要选择in which相当于in the period,表示时间，作句中的状语，故选D项。
考点 : 考查定语从句的用法