单选题
Bears ________ fat stores throughout the summer and fall to have energy enough to last them through their winter sleep.
【正确答案】
B
【答案解析】考查动词短语辨析。packup打包，收拾行李；buildup搭建，积累；bringup养育，抚养；takeup占据，拿起。根据句意，“狗熊在夏秋两季积累自己的脂肪储备，好在冬眠时有充足的能量来度过冬季。”，知B项符合题意。