While a ________ amount of stress can be beneficial, too much stress can exhaust you. ( 章节：2 难度：3)
- A、moderate
- B、modern
- C、large
- D、striking
正确答案:A
答案解析:有
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While a ________ amount of stress can be beneficial, too much stress can exhaust you. ( 章节：2 难度：3)
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