-You probably won't need to call Joe, but take his number, just .-Thanks a lot.A．at random B．in returnC．in case D．by heart 题目和参考答案——青夏教育精英家教网—

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—You probably won't need to call Joe, but take his number, just ________.

—Thanks a lot.

A．at random　B．in return

C．in case　D．by heart

【解析】　——你可能不需要给Joe打电话，不过还是记下他的电话号码吧，以防万一。——谢谢！in case“以防万一”，符合语境。

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