【题目】These remarkable findings suggest the elephants have ________ a memory capacity to make distinctions between human voices.
A. built upB. packed upC. brought up D. took up
在线课程【答案】A
【解析】
试题分析：考查动词短语辨析。A. built up建立；B. packed up打包；C. brought up抚养；D. took up占用；句意：这些惊人的发现表明大象已经建立了一种记忆能力来区分人类的声音。根据句意可知，选A项。