【題目】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

【答案】B
【解析】句意：熊在夏秋季節(jié)存儲脂肪，保存足夠的能量以度過冬眠。A. pack up”打包“；B.build up”逐步增加，增強“； C.bring up”撫養(yǎng)， 嘔吐“； D.take up”占據(jù)， 舉起 ，開始從事“。根據(jù)句意，選B。

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