数词-知识点归纳与练习一、初中英语数词1._______, when Marx was already _______, he found it was important to study the situation in Russia, so he began to learn Russian. A. In 1870s, in his fifties B. In 1870s, in fiftiesC. In the 1870s, in fifties D. In the 1870s, in his fifties【答案】 D 【解析】【分析】句意:在十九世纪七十年代,马克思已经五十岁了,他觉得讨论俄国的形势很重要,便开始学习俄语。in the 1870s 十九世纪七十年代;in one's fifties 在某人五十多岁时;故选 D。 【点评】考查时代的表达方式和固定短语。掌握时代的表达方式。2.Did you know that the earth is home to ______ animals? A. million B. millions C. million of D. millions of【答案】 D 【解析】【分析】句意: 你知道地球是几百万动物的家园吗?millions of,固定搭配,几百万的;数词+million,表示具体的……百万,此时 million 是单数形式;空前没有具体数词,因此用 millions of,故选 D。 【点评】考查数词,注意 millions of 的用法。3.______ of the students in our school are boys. A. Two three B. Second three C. Two thirds D. Two third【答案】 C 【解析】【分析】句意: 我们学校的学生中有三分之二是男生。分数词是分子是基数词,分母是序数词,分子大于一,分母加 s,因此二分之一是 two thirds,故选 C。 【点评】考查分数,注意分子是基数词,分母是序数词,分子大于一,分母加 s 的用法。4.My family lives on ________________ floor of the building. A. twelve B. the twelfth C. twelfth D. the twelve【答案】 B 【解析】【分析】句意:我家住在这栋楼的第 20 层。表示第几层,用 the+序数词+floor,固定搭配,twelve,12,基数词;twelfth,第 12,序数词,故选 B。 【点评】考查序数词用法,注意平常识记 the+序数词+floor。5.Two students to the opening ceremony last Friday. A. hundreds; were invited B. hundred; were invited C. hundreds of; invited【答案】 B 【解析】【分析】句意:上周五有 200 名学生被邀请参加开幕式。根据题干中的 two 与选项中的 hundred 可知此题考查确切数量的表达方式,hundre...