一、用括号中所给词的适当形式填空。
1. The (five) lesson is very interesting.
2. December is the (twelve) month of the year.
3. Two (third) of the students in our class are going to the summer camp.
4. The old lady will celebrate her (hundred) birthday on 15 December.
5. The (one) prize is a new bicycle.
6. Our classroom is on the (two) floor.
7. A quarter of the students in our class (be) from the countryside.
8. Who do you think is the greatest writer of the (twenty-one) century?
9. The computer is one of the greatest inventions in the (twenty) century.
10. His books are read by (million) of people every year.

1. fifth 2. twelfth 3. thirds 4. hundredth 5. first 6. second 7. are 8. twenty-first 9. twentieth 10. millions

【分析】
本题考查英语数词的用法及相关语法，解题时需先判断每个空格的功能：是修饰名词需用序数词、表达分数需遵循分数规则、主谓一致需看主语单复数，还是固定搭配的特殊形式，再对应词形变化规则作答。
【解析】
1. 修饰单数名词lesson表“第五”，用序数词，five的序数词为fifth；
2. 修饰单数名词month表“第十二”，用序数词，twelve的序数词为twelfth；
3. 分数表达规则：分子大于1时，分母序数词变复数，two是分子，third变thirds；
4. 修饰名词birthday表“第一百个”，用序数词，hundred的序数词为hundredth；
5. 修饰名词prize表“第一”，用序数词，one的序数词为first；
6. 修饰名词floor表“第二”，用序数词，two的序数词为second；
7. 主语是“a quarter of students（四分之一的学生）”，students为复数，一般现在时be动词用are；
8. 修饰名词century表“第二十一”，用序数词，twenty-one的序数词为twenty-first；
9. 修饰名词century表“第二十”，用序数词，twenty的序数词为twentieth；
10. 固定搭配millions of表“数百万的”，million需用复数形式millions。
【答案】
1. fifth 2. twelfth 3. thirds 4. hundredth 5. first 6. second 7. are 8. twenty-first 9. twentieth 10. millions
【知识点】
序数词用法、分数表达、主谓一致
【点评】
本题为英语数词基础考点的综合考查，涵盖序数词、分数、主谓一致及固定搭配，是初中英语核心基础题型，需牢记数词不同形式的变化规则。
【难度系数】
0.3

二、读短文,并在横线处用英语写出对应的数字。
A Big Number Challenge at School
Last week, our English teacher, Mr Li, gave us a special challenge. He said, “Who can write the biggest number in English?” We all started thinking. I wrote down the number 1,234,567. I said, “1. .” My friend Tom wrote 8,900,000. He said, “2. .
.” We were all very excited.
Then Mr Li wrote a number on the blackboard: 23,456,789. He asked us to read it. I raised my hand and said, “3. .” Mr Li smiled and said, “Very good!”
Next, Mr Li asked us to solve a maths problem. He said, “If you have 3,456 apples and you give away 1,234 apples, how many apples do you have left?” I did the maths and wrote, “4. apples.”
At the end of the class, Mr Li told us a fun fact. He said, “Did you know that the Earth is about 4,543,000,000 years old?” We all said, “Wow!” I wrote it as “5. years old”
This English class was really interesting. I learned how to write big numbers in English and had fun with my classmates.

1. One million two hundred and thirty-four thousand five hundred and sixty-seven
2. Eight million nine hundred thousand
3. Twenty-three million four hundred and fifty-six thousand seven hundred and eighty-nine
4. Two thousand two hundred and twenty-two
5. four billion five hundred and forty-three million

【分析】本题考查英语中数字的读写及简单减法运算，解题思路为：①处理英语大数字时，需从右向左每三位划分为一个数级，依次对应“thousand（千）”“million（百万）”“billion（十亿）”等单位，再将每个数级内的数字按百位、十位、个位的英语表达组合；②涉及减法计算时，先算出结果，再按上述规则转换为英语数字。
【解析】1. 数字1,234,567拆分后为1个百万、234个千、567，对应英语为One million two hundred and thirty-four thousand five hundred and sixty-seven；2. 数字8,900,000拆分后为8个百万、900个千，对应英语为Eight million nine hundred thousand；3. 数字23,456,789拆分后为23个百万、456个千、789，对应英语为Twenty-three million four hundred and fifty-six thousand seven hundred and eighty-nine；4. 先计算3,456 - 1,234 = 2,222，再将2,222转换为英语Two thousand two hundred and twenty-two；5. 数字4,543,000,000拆分后为4个十亿、543个百万，对应英语为four billion five hundred and forty-three million。
【答案】1. One million two hundred and thirty-four thousand five hundred and sixty-seven
2. Eight million nine hundred thousand
3. Twenty-three million four hundred and fifty-six thousand seven hundred and eighty-nine
4. Two thousand two hundred and twenty-two
5. four billion five hundred and forty-three million
【知识点】英语数字表达、数词转换、减法运算
【点评】本题将英语数词知识与数学计算结合，题型贴合课堂实际，既考查学生对英语大数字读写规则的掌握，又锻炼基础运算能力，是一道综合性较强的基础练习题。
【难度系数】0.5