2. 外语
  3. They had to be______of their food and water since they were on a small island far from the continent.

They had to be______of their food and water since they were on a small island far from the continent.

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问题 They had to be______of their food and water since they were on a small island far from the continent.
选项 A、economic
B、economical
C、practical
D、wasteful
答案B
解析
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C类竞赛（非英语专业本科）

大学生英语竞赛（NECCS）

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