The machine might break down someday in the future, ____, you can dial this numb

题干

The machine might break down someday in the future, ____, you can dial this number for help.

A．in that case	B．in what case
C．in which case	D．in whose case

上一题下一题 0.4难度单项选择更新时间:2015-12-09 05:51:09

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