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题目
题型:不详难度:来源:
In addition to the farming they ______ since the 1990s, the Smiths have started a small business.
A.have doneB.had been done
C.were doingD.have been doing

答案
D
解析

试题分析:考查时态。从时间状语since the 1990s,可知应该使用现在完成时或现在完成进行时,然后根据后面主句的谓语动词have started可推断,do 这个动词还在继续,故使用现在完成进行时。句意:自从20世纪90年以来,史密斯夫妇开了一家小公司,此外他们还一直在做农活。
核心考点
试题【In addition to the farming they ______ since the 1990s, the Smiths have started 】;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.serveB.have served
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A.is to blameB.is going to blame
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A.was visitingB.visitC.have visitedD.had visited

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—How many times have you been to China?
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A.wasB.have beenC.had beenD.am

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The athlete fell off his bike when he _____ down the hill.
A.cycledB.was cyclingC.had cycledD.is cycling

题型:不详难度:| 查看答案
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