----This returned Chinese scholar has become one of the top experts in this fiel
题型:不详难度:来源:
----This returned Chinese scholar has become one of the top experts in this field. ----Yes,I know him very well.He____in Africa with animals for eight years.A.has worke | B.had worked | C.worked | D.has been working |
|
答案
C |
解析
since,for作为连词,引导时间状语(从句)如果谓语动词是延续性的一般过去时,其表达的含义是"从这个动作结束以来",恰好和动词的词义相反,具有否定的含义;如果谓语动词是非延续性的一般过去时,其表达的含义是"从这个动作开始以来",恰好和动词的词义一致,具有肯定的含义 It is 3 years since her husband worked as a news journalist. 她丈夫不当记者已三年了。 It is 5 years since I joined the army. 我在部队已服役五年了。(仍在军队服役) |
举一反三
It ________ nearly two weeks ______ I had received his letter.A.is, that | B.was, that | C.is since | D.was, since |
|
It is five years since my dear aunt _______ here.A.left | B.has left | C.is left | D.had left |
|
Wherever I ____these days. I always carry my umbrella.A.am going | B.shall go | C.go | D.should go |
|
Oh, it"s you, I"m sorry I ____know you ____here.A.don"t, are | B.didn"t, are | C.didn"t ,were | D.don"t, were |
|
I___ to have another try if I get another chance.A.have been meaning | B.mean | C.am meanin | D.have meant |
|
最新试题
热门考点