Question

— 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

Answer 1

B

試題分析：句意：--昨晚我打電話給你,但是沒有人接電話。--哦，那很有可能我正在看醫生。依據上下文was后應是表時間的表語從句，只能用when來引導。
考點: 考查表語從句關系詞的用法。