Question

【题目】Recently our community has launched a campaign among all the residents，________we are called upon to do our little bit to prevent the worsening environment.

A．which B．that

C．when D．where

Answer 1

【答案】D

【解析】定语从句。句意：最近我们社区在所有居民中发起了一项运动，运动号召我们做力所能及的事来阻止环境的日益恶化。分析句子结构可知，空处引导非限制性定语从句，修饰先行词a campaign，且从句中不缺成分，故选关系副词where。