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Heknowslittleaboutthecityasifhetheresofar.A.isnotB.werenotC.shouldnothavebeenD.hadnotbeen

题目详情
He knows little about the city as if he ______there so far.
A.is not B.were not
C.should not have been D.had not been


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答案和解析
应该是B,后应是虚拟语气,主句是现在进行时,从句是过去进行时.