问题描述：
这里的store为什么是复数
1=浙江17.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
21【答案B
1=浙江17.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
21【答案B
问题解答：
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