1.The firemen have been examining the ground _______yesterda

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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

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

Firemen had been fighting the forest fire before they could 新概念英语53课问题Yesterday,the firemen examined the ground.和Yesterd 英语翻译1.Provided that,after examining the application,the cons Here are the firemen the plants have roots under the ground. Firemen had been fighting the forest fire for nearly three w There having been no rain,the ground was dry. Before the firemen came,they?the fire the doctor is examining the patient _____ (careful) （）Look,the doctor is examining the baby ____. 英语翻译Examining the consumption situation and sketching the (f 英语翻译However,the wealth of studies examining the (positive) o