Although he had taken a lot of medicine, his health poor.
A. prove
B. remained
C. maintain
D. lasted
网友回答
A. prove
(答案→)B. remained
C. maintain
D. lasted
解析：prove证明；remained仍然；maintain保持；lasted持续。Although he had taken a lot of medicine,用的是过去完成时，所以主句要用一般过去时，排除A,C；且句意是：尽管他吃了很多药，他的健康仍然很差。所以选B。