____about her son's safety,she made several calls as well as sending him some messages.
____about her son's safety,she made several calls as well as sending him some messages.
A.Concerning
B.Concerned
C.Having concerned
D.To concern
求详解
A.Concerning
B.Concerned
C.Having concerned
D.To concern
求详解
英语人气：472 ℃时间：2019-08-22 15:37:25
优质解答
选B,这道题中有个固定短语be concerned about,题目中用concerned,就是用形容词做状语.
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