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题目
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He works as an engineer now, but he _______ on a farm for three years.
A.has workedB.workedC.was workingD.had worked

答案
B
解析

核心考点
试题【He works as an engineer now, but he _______ on a farm for three years.A.has work】;主要考察你对一般现在时等知识点的理解。[详细]
举一反三
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A.haven’t ever sleptB.wouldn’t have slept
C.hadn’t ever sleptD.couldn’t have slept

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.Yang Liwei as well as the other two astronauts _______ to be the most qualified for space exploration.
A.consideredB.had consideredC.was consideredD.were considered

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A.are slowing disappearingB.is slowly disappearing
C.are slowly disappearedD.have slowly disappeared

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-- Isn"t it amazing that I met Francis at the Christmas party?
-- Really? For how many years ________each other?
A.didn"t you seeB.haven"t you seenC.don"t you seeD.hadn"t you seen

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All of you ____ at the school gate! We’ll soon start.
A.are gatheringB.will gatherC.have gatheredD.gather

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