While he the bus, he a book.
A. was waiting for, read
B. waited for, was reading
C. was waiting for, was reading
D. waited for, read
网友回答
A. was waiting for, read
B. waited for, was reading
(答案→)C. was waiting for, was reading
D. waited for, read
解析：考查连词：While 当……时候，动词应用延续性动词，句意：当他等公交车的时候，他正在读一本书。根据语境这两个空表示的都是过去某一时刻正在进行的动作，所以选C。