Question

He wrote a letter ______ he explains what had happened in the accident.

A．what

B．which

C．where

D．how

Answer 1

C

解析试题分析:考查定语从句。分析结构可知名词letter后面是定语从句，从句句意完整，所以判断用关系副词引导，how不引导定语从句，故答案选C。句意：他写了一封信，在信里解释了事故中发生的事情。
考点：考查定语从句。