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题型：单选题 题类：常考题 难易度：普通
仁爱科普版七年级上Unit4 Having Fun Topic 1 What can I do for you?同步练习1
—That's terrible. You know sleep is _____ for good health.
—Oh, I only need __________orange juice.
—Sounds great! Hiking is a good way to keep fit.
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