The key to staying healthy and strong when backpacking(挑运) is to eat( )of energy-rich foods. ( 章节：6 难度：3)
- A、large quantities
- B、large quantity
- C、great quantities
- D、large quantity
正确答案:A
答案解析:有
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The key to staying healthy and strong when backpacking(挑运) is to eat( )of energy-rich foods. ( 章节：6 难度：3)
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