Question

【题目】My sister was writing an e-mail _______ I was watching TV at this time yesterday.

A. until B. after

C. while D. as soon as

Answer 1

【答案】C

【解析】试题分析：句意：昨天当我正看电视的这个时候，我的妹妹正在写一封电子邮件。A. until直到……；B. after在……之后；C. while当……；D. as soon as一……就……。这几个词都引导时间状语从句。而while,强调从句的动作在发生的过程中，主句的动作发生了，或者强调两个动作同时发生。根据该句中两个动作同时发生，故选C。