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________about her son’s future, the mother has been sleeping very badly these months.

A.ConcerningB.ConcernedC.To concernD.Having concerned

B

解析试题分析:考查非谓语动词。句意:担心她儿子的未来,那位妈妈几个月以来都没有睡好觉。concerning关于;sb be concerned about...关心/担心......,是固定搭配;相当于sb be worried about...。非谓语的逻辑主语是the mother,故用concerned。故选B。
考点: 考查非谓语动词

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