Question

a)We were about to leave ____it began to rain. b)She thought I was talking her son, _____,

in fact, I was talking about my son.
c)Hardly had I finished my composition ____ the bell rang.
A when B while C as D during
答案是 A B A请问为什么这样选？

Answer 1

第一个是A，began是短暂性动词，所以不能用B，所以是A
第二个，was talking是过去进行时，是延续性动词，所以可以用B，当然A也没什么大的错误。
第三个选A，rang是短暂性动词，所以是A

Answer 2

when翻译为“这时”。while翻译为“然而”。hardly...when翻译为“一......就......”