题目内容
【题目】Are you concerned your mother when she is out in Africa?
A. about
B. in
C. at
D. over
【答案】A
【解析】be concerned about意为“关心，挂念”。
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题目内容
【题目】Are you concerned your mother when she is out in Africa?
A. about
B. in
C. at
D. over
【答案】A
【解析】be concerned about意为“关心，挂念”。