B．To explain chances for future professional life.

　　C．To tell readers how to study smart at college.

　　D．To introduce good techniques in preparing for exams.

　　Ⅴ.阅读填空

　　(2015·汝城一中、长沙实验中学高三联考)Today，February twenty－ninth，is leap day(闰日)．This date only appears on the calendar once every four years.But why?

　　Everyone knows the Earth takes three hundred sixty－five days to travel around the sun.Well，that is not exactly correct.The Earth really takes three hundred sixty－five days，five hours，forty－eight minutes and forty－six seconds to complete its orbit around the sun.

　　The problem for people developing calendars was what to do with the extra five hours，forty－eight minutes and forty－six seconds.

　　People needed calendars to help them know when to plant crops and when to celebrate religious holidays.The ancient Greeks and Chinese had a solution.They produced calendars that included extra months every nineteen years.

　　The ancient Romans had a different solution.In the year forty－six，the Roman ruler Julius Caesar made a new calendar.The Julian calendar included an extra day every four years.But there was a problem.The Julian year was just over eleven minutes longer than the cycle of the seasons.In 1582，Pope Gregory the Thirteenth established a new calendar to keep a better recorder of the days.Pole Gregory was the religious leader of most of Europe.He decided that years that could be divided by four would add a day.However，years that ended in two zeros and that could not be evenly divided by four hundred would not be leap years.For example，the years 1700,1800 and 1900 were not leap years.But the years 1600 and 2000 were leap years.

【2016届高考英语二轮课后检测：9 Unit3 back to the past（牛津译林版）】相关文章：

★ 北京市2014高考英语一轮复习 练习手册（31）选修7 Unit 1 Living well（含解析）新人教版

★ （安徽专用）2014届高考英语一轮复习方案 作业手册（21）模块7 《Unit 21 Human Biology》（含解析） 北师大版必修1

★ 2017届高考英语二轮复习大题冲关秘籍阅读理解七选五：创新押题（含解析）

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修5 unit3《Life in the future》

★ 2017届高考英语二轮复习课时训练：1（含解析）

★ 【浙江专用】2014届高考英语一轮复习课时作业(十四)必修3 Unit 4《Astronomy：the science of the stars》

★ 2014届高考英语一轮复习课时作业(十六)必修3Module 4《Sandstorms in Asia》（外研版）

★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ规范练：7（含解析）

★ （安徽专用）2014届高考英语一轮复习方案 作业手册（20）模块7 《Unit 20 New Frontiers》（含解析） 北师大版必修1

★ （安徽专用）2014届高考英语一轮复习方案 作业手册（17）模块6 《Unit 17 Laughter》（含解析） 北师大版必修1