Question

【题目】I _____ him a second letter before I ____ from him.

A. wrote…heard B. wrote…had heard

C. had written…heard D. have written…hear

Answer 1

【答案】C

【解析】句意：在我收到他的来信之前，我已经又给他写了一封信。这里是before引导的时间状语从句，主句用过去完成时，从句用一般过去时态，过去完成时的结构是had done的形式，短语hear from…表示收到……。根据题意，故选C。