摘要： C.keep - doing 意为“让--一直干某事 .
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I believe they will ______ it ______ and won't tell the others．
A．keep；clean B．keep；long
C．keep；secret D．keep；cool
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It's our duty ________ the classroom________.
A. keep; clean B. to keep; clean C. to keep; cleaner D. keep; cleaner
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You can ______ some books from the library and ______ them for two weeks, but you mustn't ______ them to others.
[ ]
A. borrow, borrow, lend B. lend, lend, borrow
C. borrow, keep, lend D. keep, lend, keep
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