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    15．Well，      ，he is just my  celleague． But I think we  can become best friends one day．（　　）
    A．time and againB．now and then
    C．in the mean timeD．for the moment

    分析 虽然目前他只是我的同事．但是我认为总有一天我们会成为好朋友的．

    解答 答案：D time and again常常；now and then有时；in the mean time同时；for the moment目前．根据后文"未来的某天会成为好朋友"，得知同事关系应为现阶段的事，for the moment目前，符合语境．故选D．

    点评 本题考查介词短语的语义辨析，考生在平时的学习中应注意积累，在熟悉知识的基础上结合语境，从而选择出正确答案．

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