Bears ________ fat stores throughout the summer and fall to have energy enough to last them through their winter sleep.                                     (2013·浙江，17)
A．pack upB．build up
C．bring upD．take up
B
解析　考查動(dòng)詞短語(yǔ)辨析。pack up打包，收拾行李；build up搭建，積累，增強(qiáng)；bring up養(yǎng)育，撫養(yǎng)；take up占據(jù)，拿起。根據(jù)句意“熊在夏秋兩季積累自己的脂肪儲(chǔ)備，以便在冬眠時(shí)有充足的能量來(lái)度過(guò)冬季�！敝狟項(xiàng)符合題意。
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