题目内容
There are some health problems that, when _____ in time, can become bigger ones later on.
A. not having been treated B. not being treated
C. not to be treated D. not treated
D
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题目内容
There are some health problems that, when _____ in time, can become bigger ones later on.
A. not having been treated B. not being treated
C. not to be treated D. not treated
D