---You look unhappy, what’s happening, my son? ---I’m wondering how long it’ll b

---You look unhappy, what’s happening, my son? ---I’m wondering how long it’ll b

题型:不详难度:来源:
---You look unhappy, what’s happening, my son?
---I’m wondering how long it’ll be________ we come to China again.
A.sinceB.whenC.beforeD.after

答案
C
解析

试题分析:考查句型:It will be +一段时间+before…,要多长时间才…,这句话是这个句型的特殊问句,how long对一段时间提问,句意:---你看起来很不高兴,怎么了?--我想知道什么时候才可以再来中国。选C。
点评:固定句型:It was+一段时间+before…,要多久…就(才)…,在考试中出现的很多,容易混淆的句型是it is/has been 一段时间since从句(过去时);自从…以来,已经有一段时间了。区分的时候,一是从句意判断,还有就是根据主句的时态区分。
举一反三
I ____ at my new novel when the big earthquake happened at 2:20 pm.
A.am workingB.was workingC.have worked D.had been working

题型:不详难度:| 查看答案
I was leaving the office when it suddenly     to me that I had forgotten my keys.
A.struckB.happenedC.occurred D.hit

题型:不详难度:| 查看答案
The crowd cheered wildly at the sight of Liu Xiang, who was reported, throughout the whole country, ____ the world record in the 110-meter hurdle race.
A.breakingB.having broken
C.to have brokenD.to break

题型:不详难度:| 查看答案
_____ is no doubt _____ Jennifer will come to see me this weekend as usual.
A.It; thatB.It; whether
C.There; thatD.There; whether

题型:不详难度:| 查看答案
Loulan is believed __________ over by sandstorms gradually from AD200 to AD400.
A.to coverB.to be covered
C.to have coveredD.to have been covered

题型:不详难度:| 查看答案
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