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二、完形填空
阅读短文，掌握其大意，然后从A、B、C、D中选出可以填入空白处的最佳选项。
Pi (π) is a very important number in maths. It is special because it goes on forever without repeating.
Calculating pi has many meanings. First, it helps us test 1.
helps find problems in the computer and 2.
Pi is also very useful in science and engineering. In the field of 3.
In maths, pi helps us understand more about numbers. Mathematicians always try to find the 5.
Pi is also important in keeping our information 6.
Finally, calculating pi is a 8.
In short, calculating pi is important. It is a number that helps us understand the 10.
1. A. computers B. houses C. circles D. machines
2. A. sell B. break C. improve D. reduce
3. A. art B. sport C. space D. medicine
4. A. work out B. find out C. give out D. put out
5. A. law B. colour C. shape D. sound
6. A. risky B. safe C. public D. hidden
7. A. weak B. short C. common D. strong
8. A. job B. game C. hobby D. challenge
9. A. copy B. forget C. memorize D. read
10. A. sky B. world C. school D. history
阅读短文，掌握其大意，然后从A、B、C、D中选出可以填入空白处的最佳选项。
Pi (π) is a very important number in maths. It is special because it goes on forever without repeating.
Calculating pi has many meanings. First, it helps us test 1.
A
. The more digits of pi a computer can calculate, the better it is. This alsohelps find problems in the computer and 2.
C
it.Pi is also very useful in science and engineering. In the field of 3.
C
, scientists use pi to study planets and stars. The result of pi is helpful to understand how planets move. In everyday life, pi is used in GPS systems to help us 4. B
our way.In maths, pi helps us understand more about numbers. Mathematicians always try to find the 5.
A
of the digits of pi. But it is hard to find the answer.Pi is also important in keeping our information 6.
B
. Because pi is so long and random（随机的）, it can be used to create 7. D
passwords. This helps protect our personal data.Finally, calculating pi is a 8.
D
for humans. It tests our intelligence and helps us learn more about maths. Some people even try to 9. C
as many digits of pi as they can. This is not only fun but also a way to exercise our brains.In short, calculating pi is important. It is a number that helps us understand the 10.
B
better.1. A. computers B. houses C. circles D. machines
2. A. sell B. break C. improve D. reduce
3. A. art B. sport C. space D. medicine
4. A. work out B. find out C. give out D. put out
5. A. law B. colour C. shape D. sound
6. A. risky B. safe C. public D. hidden
7. A. weak B. short C. common D. strong
8. A. job B. game C. hobby D. challenge
9. A. copy B. forget C. memorize D. read
10. A. sky B. world C. school D. history
答案
1. A 2. C 3. C 4. B 5. A 6. B 7. D 8. D 9. C 10. B
解析
【分析】
先通读全文把握主旨：文章介绍圆周率的重要意义，再结合每个空格的上下文语境、词汇含义及搭配逐一分析选项：1. 由后文“电脑计算圆周率位数越多越好”可知，此处是测试电脑；2. 前文提到发现电脑问题，对应“改进”；3. 后文涉及行星、恒星，属于太空领域；4. GPS的作用是找到路径；5. 数学家研究圆周率数字的规律；6. 固定搭配表示保持安全；7. 圆周率随机且长，适合生成强密码；8. 计算圆周率对人类是一种挑战；9. 人们尝试记忆更多圆周率位数；10. 总结圆周率帮助理解世界。
【解析】
1. 选A。根据后文“the more digits of pi a computer can calculate, the better it is”，计算圆周率可测试电脑性能，故选A。
2. 选C。前文提到“find problems in the computer”，对应“improve（改进）”，即发现问题后改进电脑，故选C。
3. 选C。后文提到“planets and stars”，属于太空（space）领域，故选C。
4. 选B。“find out one's way”是固定搭配，意为“找到路”，符合GPS的功能，故选B。
5. 选A。“law”在此处意为“规律”，数学家研究圆周率数字的规律，符合语境，故选A。
6. 选B。“keep sth safe”是固定短语，意为“保持某物安全”，对应后文“protect our personal data”，故选B。
7. 选D。圆周率随机且长度长，适合生成“strong（强的）”密码，故选D。
8. 选D。计算圆周率对人类智力是一种“challenge（挑战）”，符合语境，故选D。
9. 选C。人们尝试“memorize（记忆）”更多圆周率位数，与后文“exercise our brains”呼应，故选C。
10. 选B。总结全文，圆周率帮助我们更好理解“world（世界）”，故选B。
【答案】
1.A 2.C 3.C 4.B 5.A 6.B 7.D 8.D 9.C 10.B
【知识点】
完形填空、词汇辨析、上下文语境理解
【点评】
本文围绕圆周率的重要性展开，考查学生对词汇的掌握及语篇逻辑的理解，需结合上下文语境和词汇搭配解题，难度适中。
【难度系数】
0.6
先通读全文把握主旨：文章介绍圆周率的重要意义，再结合每个空格的上下文语境、词汇含义及搭配逐一分析选项：1. 由后文“电脑计算圆周率位数越多越好”可知，此处是测试电脑；2. 前文提到发现电脑问题，对应“改进”；3. 后文涉及行星、恒星，属于太空领域；4. GPS的作用是找到路径；5. 数学家研究圆周率数字的规律；6. 固定搭配表示保持安全；7. 圆周率随机且长，适合生成强密码；8. 计算圆周率对人类是一种挑战；9. 人们尝试记忆更多圆周率位数；10. 总结圆周率帮助理解世界。
【解析】
1. 选A。根据后文“the more digits of pi a computer can calculate, the better it is”，计算圆周率可测试电脑性能，故选A。
2. 选C。前文提到“find problems in the computer”，对应“improve（改进）”，即发现问题后改进电脑，故选C。
3. 选C。后文提到“planets and stars”，属于太空（space）领域，故选C。
4. 选B。“find out one's way”是固定搭配，意为“找到路”，符合GPS的功能，故选B。
5. 选A。“law”在此处意为“规律”，数学家研究圆周率数字的规律，符合语境，故选A。
6. 选B。“keep sth safe”是固定短语，意为“保持某物安全”，对应后文“protect our personal data”，故选B。
7. 选D。圆周率随机且长度长，适合生成“strong（强的）”密码，故选D。
8. 选D。计算圆周率对人类智力是一种“challenge（挑战）”，符合语境，故选D。
9. 选C。人们尝试“memorize（记忆）”更多圆周率位数，与后文“exercise our brains”呼应，故选C。
10. 选B。总结全文，圆周率帮助我们更好理解“world（世界）”，故选B。
【答案】
1.A 2.C 3.C 4.B 5.A 6.B 7.D 8.D 9.C 10.B
【知识点】
完形填空、词汇辨析、上下文语境理解
【点评】
本文围绕圆周率的重要性展开，考查学生对词汇的掌握及语篇逻辑的理解，需结合上下文语境和词汇搭配解题，难度适中。
【难度系数】
0.6
