—I rang you at about nine，but there was no reply．—Oh，that was probably        I

题型：不详难度：来源：

—I rang you at about nine，but there was no reply．
—Oh，that was probably        I was seeing the doctor．

A．why

B．when

C．what

D．that

答案

B

解析

试题分析：句意：--昨晚我打电话给你,但是没有人接电话。--哦，那很有可能我正在看医生的时间。依据上下文was后应是表时间的表语从句，只能用when来引导。选B。
考点: 考查表语从句关系词的用法。