______about the safety of her son who had been missing for a week,the mother .....
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时间：2024-08-17 10:54:28
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______about the safety of her son who had been missing for a week,the mother .....【专家解说】：这
【专家解说】：这里应该是用分词填空
肯定不选B，因为B是表被动，“妈妈被担心”的意思，语意不对，排除
同样不选C，本人认为，貌似没有concern about的结构哎……
哦吼吼吼，可能是我没见过吧~~~~~
所以应该是选A
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