【题目】Back from his two-year medical service in Africa, Dr. Lee was very happy to see his mother good care of at home.
A.taking
B.taken
C.take
D.be taken

【答案】B
【解析】句意：在非洲医疗援助两年回来后，Dr. Lee很高兴看见妈妈被照顾得很好。his mother和take care of是被动关系，用过去分词做宾语补足语，所以选B。