Question

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

Answer 1

C

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。