Question

【题目】Bears _________ fat stores throughout the summer and fall to have energy enough to last them through their winter sleep.

A. pack up B. build up C. bring up D. take up

Answer 1

【答案】B

【解析】句意：熊在整个夏季和秋季积累脂肪，以便能使它们在冬天冬眠的时候有足够的能量。build up

集聚，积累，符合句意。pack up打包整理；bring up抚养长大；take up从事。