In order to know how heavy the elephant was, he wrote down the weight of each stone and then all the weights.
A. packed up
B. added up
C. went through
D. set down
网友回答
A. packed up
(答案→)B. added up
C. went through
D. set down
解析：动词短语辨析。A打包，收拾，整理；B加起来；C经历，完成；D定居；句意：为了指代大象的重量，他把每块石头的重量都记录下来，然后再把所有的重量都加了起来。根据句意说明B正确。