四、信息还原
Zu Chongzhi is one of the greatest mathematicians in ancient China. He was born during the Northern and Southern Dynasties. His family were very talented. They had been studying maths and astronomy（天文学）for generations（世代）. From a young age, Zu was taught natural science, astronomy, maths and so on. 1.
E
Zu was best known for his calculation（计算）of pi. According to historical records, he did all the work using nothing but wooden sticks. 2.
G
No one at that time was able to calculate it more accurately（精确地）than Zu. The achievement（成就）has been accepted around the world. In order to remember Zu, some mathematicians have suggested calling pi “zulv”（祖率）.
Zu was also famous for working out how to calculate the volume（体积）of a ball. 3.
C
The two recorded their achievement in Zhuishu. The book was used as a maths textbook during the Tang Dynasty.
4.
D
He worked out that a year should be 365.24281481 days long and created the Daming Calendar. But unluckily, the great mathematician never saw his calendar put into use.
5.
F
Almost ten years later, the Daming Calendar was finally accepted.
A. Zu was also an inventor.
B. However, nobody paid attention to the result.
C. He did this with the help of his son Zu Geng.
D. Zu was successful not only in maths but in astronomy.
E. The little boy was interested in all of these subjects, especially（尤其）in maths.
F. After he died, Zu Geng kept on proving（证明）that the new calendar was more accurate.
G. It took him lots of time to work out the value—between 3.1415926 and 3.1415927.
解析：
【分析】
做英语信息还原题，需重点关注上下文的指代关系、话题衔接及逻辑关联（如递进、承接等）。第1空：前文提到祖冲之从小学习自然科学、天文学、数学等多门学科，空格前的“From a young age”对应E选项的“The little boy”，且E选项中“all of these subjects”指代前文的多门学科，故1选E；第2空：前文讲祖冲之计算圆周率，空格后说明当时没人能算出更精确的结果，G选项给出圆周率的具体计算数值，承接上文的计算内容，故2选G；第3空：前文讲祖冲之算出球的体积，后文提到“the two recorded their achievement”，C选项提到“在儿子祖暅的帮助下”，对应后文的“the two”（父子二人），故3选C；第4空：前文讲祖冲之的数学成就，后文讲他在天文领域的成就（创制大明历），D选项“not only in maths but in astronomy”承上启下，连接数学和天文两个领域的成就，故4选D；第5空：前文说祖冲之没能看到自己创制的历法被使用，后文说十年后历法被接受，F选项提到“祖冲之去世后，祖暅继续证明新历法的准确性”，衔接上下文，说明儿子的努力最终让历法被认可，故5选F。
【解析】
1. 第1空：根据前文“From a young age, Zu was taught natural science, astronomy, maths and so on”，E选项的“The little boy”指代祖冲之，“all of these subjects”对应前文的多门学科，逻辑连贯，故选E。
2. 第2空：前文提到“his calculation of pi”“did all the work using nothing but wooden sticks”，G选项给出圆周率的具体计算结果（3.1415926和3.1415927之间），承接上文的计算内容，故选G。
3. 第3空：前文讲“calculate the volume of a ball”，后文提到“The two recorded their achievement in Zhuishu”，C选项“with the help of his son Zu Geng”对应后文的“The two”（父子二人），故选C。
4. 第4空：前文讲祖冲之的数学成就，后文讲他在天文领域创制大明历的成就，D选项“not only in maths but in astronomy”承上启下，连接两个领域的成就，故选D。
5. 第5空：前文说“the great mathematician never saw his calendar put into use”，后文说“the Daming Calendar was finally accepted”，F选项“After he died, Zu Geng kept on proving that the new calendar was more accurate”衔接上下文，说明历法被接受的原因，故选F。
【答案】
1.E 2.G 3.C 4.D 5.F
【知识点】
英语信息还原、上下文逻辑衔接、指代关系
【点评】
本题考查英语语篇的逻辑连贯性，要求学生结合上下文的指代、话题延续等线索选择合适的句子，解题关键是理清句间的逻辑关联，难度适中，多数学生可通过分析上下文关系得出正确答案。
【难度系数】
0.5
