Question

【題目】——How did Tom hurt his leg yesterday？——He was walking home ______a bike hit him.

A. while B. when C. before D. because

Answer 1

【答案】B

【解析】句意：——湯姆昨天是怎么傷到腿的？——他騎車回家時(shí)，一輛自行車撞到了他。A. while 然而，與……同時(shí)；B. when當(dāng)……時(shí)候，此時(shí)；C. before在……之前；D. because因?yàn)椤?/span>when與while都可以引導(dǎo)時(shí)間狀語從句，與while連用的句子應(yīng)該是進(jìn)行時(shí)態(tài)，或者是拜師延續(xù)性的動(dòng)作，應(yīng)排除，故答案為B。