Jack had traveled six miles across the channel ___________ his engine failed and was forced to land

题目

Jack had traveled six miles across the channel ___________ his engine failed and was forced to land
A.until B.after C.since D.when
为什么选d
不选a

答案

根据时态来说,had done先于done发生,所以这句话应是“杰克在飞过海峡六英里时,他的引擎突然出问题而被迫着陆”.在做某事时,突然发生另一事之意用when