题目内容
1．That is almost onefifth/fifθ/of the world's population．分析 那差不多是世界上五分之一的人口．
解答 答案：fifth．
根据空格前面的词语是one，后面是of，因此可知此处是一个分数的表达法，结合给出的音标提示/fifθ/，故填序数词fifth．
点评 首先要掌握句子的意思，然后结合具体的题目以及给出的音标提示，就可以确定正确答案．
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