【正确答案】 A

【答案解析】[解析] concerned with关心，为固定搭配。涉及到concerned的用法还有： be concerned in：涉及…的e．g． He was concerned in the scandal．他涉及那件丑闻。be concerned about：对于…关切e．g． We are all very (much) concerned about/over her health．我们都非常关切她的健康。