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.It is said that the early European playing-cards ______for entertainment and education.
A.were being designedB.have designedC.have been designedD.were designed

答案
C
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核心考点
试题【.It is said that the early European playing-cards ______for entertainment and ed】;主要考察你对一般现在时等知识点的理解。[详细]
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Years ago we didn’t know this , but recent science______that people who don’t sleep well soon get ill.
A.showedB.has shownC.will showD.is showing

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– I have got a headache.
--No wonder. You ___in front of that computer too long.
A.workB.are workingC.have been workingD.worked

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Leaders of the BRIC countries-----Brazil, Russia, India and China----_______their second summit on Friday. President Hu Jintao then returned home to help direct relief work ______the deadly earthquake in Qinhai.
A.left, to followB.concluded, following
C.had left, followingD.had concluded, followed

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Every possible means _______to prevent the air pollution, but the sky is still not clear.
A.are being usedB.have been usedC.has been usedD.had been used

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I ______ on a sofa because my grandparents have come for the weekend.
A.sleptB.was sleepingC.have sleptD.am sleeping

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