【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】A. pack up打包； B. build up積累； C. bring up養(yǎng)育； D. take up拿起；占據(jù)。句意：整個夏天和秋天，熊不斷儲存脂肪，好使自己有足夠的能量冬眠。根據(jù)句意選B。

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