He was about halfway through his meal a familiar voice came to his ears.
A.why B.where C.when D.while
He was about halfway through his meal a familiar voice came to his ears.
A.why B.where C.when D.while
C
when作连词,表“正在这时,突然”,主句中的谓语动词往往是表示状态存在或动作进行的词。