So leap years are years with three hundred sixty－six days，instead of the usual three hundred sixty－five.This extra day is added to the calendar on February twenty－ninth，sometimes known as leap day.People born on leap day may be called “leapings”．They usually celebrate their birthday on February twenty－eight or March first.

　　Title：1.____________

　　Reasons The Earth really takes 356 days,5 hours,48 minutes and 46 seconds to complete its orbit around the sun.

　　2.____________ is needed to benefit people’s daily life and work.

　　3.____________ How to deal with the extra 5 hours,48 minutes and 46 seconds.

　　4.____________ 5.____________ Ways

　　Ancient

　　Greeks

　　and Chinese Producing 6. ___________

　　every 19 years

　　7. ___________Producing an extra

　　day 8.____________

　　The Pop

　　Gregory ⅩⅢ Producing a leap day if the year could be divided 9.____________.No leap day when the year ended in two zeros but could not be divided by 400.

　　Result Leap day 10.____________ and February twenty－ninth was added to the calendar.

　　Ⅵ.阅读简答

　　(2015·岳阳一中高三月考)Elephants and people are in competition for space. In much of Africa, elephants are now put in national parks. Elephants suffered a serious and steady decrease in number in the 1970s.This was the same time when scientists were beginning to learn a great deal about elephants and their behavior. Studies through the 1980s and into the 1990s showed a lot about their sounds and methods of communication.

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