Question

【题目】The letter _______ I received from him yesterday is very important.

A. who B. where C. what D. that

Answer 1

【答案】D

【解析】句意：昨天我收到的他的那封来信非常重要。who引导定语从句，修饰人，作主语，宾语或表语；where引导定语从句，作地点状语。what引导名词性从句，作主语，宾语或表语。that引导定语从句，修饰人或事物，作主语，宾语或表语；此处先行词the letter表示事物，在定语从句中动词received后面缺少宾语，故用that引导，故选D。