Immediately he was elected monitor, James his duties since.
A. took up
B. has taken up
C. made up
D. has made up
网友回答
A. took up
(答案→)B. has taken up
C. made up
D. has made up
解析：考查时态。Take up开始从事；make up组成，整理。句意：自从詹姆斯负起他的责任，詹姆斯立即被选为班长。结合语境可知下文描述的现在已经完成的动作，选B。