Question

求助几道英语选择题~急需！！！先O(∩_∩)O谢谢个位啦~

1.The firemen have been examining the ground _______yesterday.
A.since B.for C.ago D.by
2.They discovered the cause _________.
A.by chance B.chancily C.fortunately D.luckily
3.The bird had snatched up the snake form the ground.It had _____it.
A.taken B.pulled C.seized D.caried
4.She had hardly got backto the kitchen _______ doorbell rang.
A.when B.lthen C.as D.as soon as

就这4道，先O(∩_∩)O谢谢个位囖~

Answer 1

1 A since,自从,多用于现在完成时
2 A 偶然地,chancily是不安全的,C,D都是幸运地
3 C 抓住
4 A hardly....when，刚一...就....主句使用过去完成时

Answer 2

1.A 2.D 3.B 4.A

Answer 3

1 A since+时间点 用于现在完成时
2 A 偶然地
3 C 抓住
4 A 固定句型：when引到时间状语从句，主句使用过去完成时

Answer 4

A A C A?