This is an illness that can result in total blindness if untreated in time. A. being left——青夏教育精英家教网—

摘要： This is an illness that can result in total blindness if untreated in time. A. being left B. left C. to be left D. leaving

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This is an illness that can result in total blindness if ________ untreated in time.

A. being left B. left C. to be left D. leaving

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