【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:黑熊在整個(gè)夏天和秋天積蓄的脂肪足夠它們維持整個(gè)冬眠期。build up逐漸增加;符合句意。pack up停止,收工;bring up撫養(yǎng),使……長大;take up開始從事,占據(jù)。故選B。

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