Question

【题目】Dingtalk is a tool _______ is mainly used for teachers and students to have online classes during the fight against the novel coronavirus.

A.whichB.whoC.whereD./

Answer 1

【答案】A

【解析】

句意：钉钉是一个工具，主要用于教师和学生在抗击新型冠状病毒期间进行在线课程。

考查定语从句的关系代词。which代指物，作主宾；who代指人，作主语；where哪里，关系副词；根据a tool是先行词，是物，在定语从句作主语，可推测出此处是“which”，故选A。