When ______ if he had any idea of what the novel was about, Jack just kept silen

题型：不详难度：来源：

When ______ if he had any idea of what the novel was about, Jack just kept silent.

A．asking	B．asked
C．to ask	D．being asked

答案

B

解析

试题分析：考查状语从句的省略式，当主从句的主语一致时，可以省略从句的主语和be动词，when asked="when" he was asked句意：当被问及是否知道这个小说是关于什么的，杰克只是保持沉默。选B。
点评：我们做此类题目时，可以用还原法做题，题目就更清楚了。也可以直接考查主语和所填动词的关系，主动说是现在分词，被动是过去分词。