题目内容：

    Like clockwork, nearly every fourth February includes one extra day. February 29th, otherwise known as Leap Day, isn’t exactly a holiday. Instead, it’s there to keep your calendar consistent with the earth’s rotation (旋转) around the sun.

According to History, com, Roman emperor Julius Caesar is the “father” of Leap Year. Until he came along, people used a 355-day calendar, which was 10.25 days shorter than the solar year. Roman officials were supposed add an extra month every now and then to keep the seasons exactly where they should be. But that didn’t work out all that well. When special occasions started shifting into different seasons around 45 BCE, Caesar consulted with astronomers and decreed (下令) that the empire should use a 12-month, 365-day calendar, which he named after himself, Caesar’s Julian calendar included a Leap Day every four years.

Though Leap Day keeps your calendar in line with the earth’s rotation around the sun, it causes a different kind of problem for leapsters. When should these February 29th babies celebrate their birthdays during the other three-quarters of their lives? Some party on February 28th, while others prefer a two-day celebration that spans the last day of February and the first day of March.

Leap Day can be a nuisance in the legal system. In 2006, a court in Massachusetts was deciding whether criminal John Melo could be released a day early since his 10-year sentence included a Leap Day. In the case, the judge decided that since the man was sentenced to prison for years, not days. Leap Day didn’t make a bit of difference.

Though a few timekeepers have pushed for calendars that don’t include Leap Day, almost all astronomers and societies agree that Leap Day is the best method to keep the calendar on track.

1.Why was Leap Day created?

A.To celebrate special occasions. B.To honor Emperor Julius Caesar.

C.To keep pace with the solar year. D.To keep track of all the seasons.

2.What is the problem with the birthday celebration of February 29th babies?

A.It is sometimes delayed. B.It lasts at least two days.

C.It has to be held every other year. D.It may take place on different dates.

3.What does the underlined word “nuisance” in Paragraph 4 mean?

A.Joke. B.Topic.

C.Trouble. D.Mistake.

4.what is the attitude of most astronomers towards Leap Day?

A.Critical. B.Supportive.

C.Doubtful. D.Cautious.