单选题
Dr. Smith was always ______ the poor and the sick, often providing them with free medical care.
【正确答案】
D
【答案解析】[解析] 考查词组辨析。本句意为“Smith医生总是很关心那些贫穷的人和病人，他经常免费给他们看病”。be concerned about“关心”符合句意。A项的be reminded of“使某人想起或意识到”；B项的be absorbed in“被某物所吸引”；C项的tend作及物动词，意为“照料，照顾”，tend to do意为“倾向于做某事”。