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    【题目】I can lend my bike to you ___________ you promise to take good care of it.

    A. whileB. ifC. althoughD. unless

    【答案】B

    【解析】

    句意：如果你答应我好好照顾它，我可以把自行车借给你。

    根据I can lend my bike to you和 you promise to take good care of it.之间的关系，可知是条件，如果你答应我好好照顾它，while当……的时候，然而；if假如，如果；although尽管，虽然；unless除非，如果不，相当于if not，除非……否则。结合句意可知选B。

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