We had better pay attention to some health problems that, when ________ in time,

题干

We had better pay attention to some health problems that, when ________ in time, can become bigger ones later on.

A．not treated	B．not to be treated
C．not having been treated	D．not being treated

上一题下一题 0.4难度单项选择更新时间:2018-09-21 03:46:37

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