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__happiness is built on the basis of health.

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__happiness is built on the basis of health.
a.ninth-tenth b.nine-tenth c.nine-tenths d.nine-ten 选什么 为什么啊
可是有的题表分数却看到连字符 还后面加s 如we could hardly see any trees here ten years ago,but now____of this area is covered by trees.答案却是two-thirds 为什么啊
选B
nine-tenths是名词性的“十分之九”
nine-tenth是形容词性的“十分之九的”
根据题意,需要一个形容词做定语,所以选B