The key to staying healthy and strong when backpacking(挑运) is to eat( )of energy-rich foods. ( 章节：6 难度：3)_做题室

单项选择题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：
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