中国农科院烟草所邮编:【last Friday moring I was just about to get on the bus ____ I found my wallet left at home. ..

来源:百度文库 编辑:查人人中国名人网 时间:2024/05/05 09:32:43
last Friday moring I was just about to get on the bus ____ I found my wallet left at home.

A when B before C while D after
WHY???????????????
why not `C`?

的确是选A,这是考when与while的区别。。
1,当从句是延续性动词,两者均可
2,当从句是短暂性动词,只可用when
3,当主从句都是进行时态,只可用while
儿本句中从句是短暂性动词,所以只可用when,谢谢! 望采纳!:-)

A?
不太明白
我也感觉选c

c