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【C6】A.asB.withC.thanD.to
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【C6】A.inB.ofC.atD.to
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【C6】A.having carriedB.to carryC.carryingD.carried
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【C6】A.reachB.reachingC.to reachD.to reaching
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【C6】A.readingB.to readC.readD.doing
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【C6】A.assistant"sB.professor"sC.student"sD.librarian"s
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【C6】A.uponB.forC.asD.to