题目内容
6.It's histwentieth (twenty) time to come here by plane.分析 这是他第二十次乘坐飞机来这.
解答 答案:twentieth.本题考查的是序数词的用法,在这里修饰time,作定语,表示第20次,应该用twenty的序数词,故答案是twentieth.
点评 数词分为基数词和序数词两种.表示数目或数量多少的词叫基数词;表示数目顺序的词叫序数词.在做此类题目时,首先要判断到底是要基数词还是序数词,其次要注意数词的变化形式.
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