---Haveyouworkedtogetherwiththelocaldoctorsforalongtime...
问题详情:
---Have you worked together with the local doctors for a long time?
---Yes, since I to the community.
A. has come B. comes C. had come D. came
【回答】
D
【解析】句意:-你和当地的医生们一起工作了很长时间了吗?-是的,自从我来到这个社区。has come现在完成时态,来;comes是第三人称单数形式;had come是过去完成时态;came是come的过去式,这里是一般过去时态。句中since是一个连词,意思是自从,引导时间状语从句,从句中常用一般过去时态,主句用现在完成时态。因此应选D。
知识点:动词时态
题型:选择题
-
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.已知各项均不为零的数列{an},定义向量.下列命题中真命题是( )A.若∀n∈N*总有cn⊥bn成立,则数...
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下列反应的离子方程式正确的是( )A.在碳**镁溶液中加入足量Ca(OH)2溶液:Mg2++2HCO3-+C...
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_____togiveupsmoking,hethrewawayhis_______cigarettes. ...
问题详情:_____togiveupsmoking,hethrewawayhis_______cigarettes. A.Determining;remained B.Determining;remaining C.Determined;remained D.Determined;remaining【回答】D知识点:分词题型:选择题...
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