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【C7】A.atB.toC.forD.over
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【C18】A.atB.toC.inD.of
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【C18】A.give upB.give inC.draw upD.draw on
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【C19】A.withB.inC.forD.on
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A concert will be held here_____ 4 pm _____Tuesday.A. on... atB. in...inC. at... on
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Visitors are asked to comply _____ the regulations.A.atB.inC.withD.on
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Don laugh ______ your classmate. You shoud help him.A.atB.inC.on