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　　Why is 2004 a special year? Because it is a Leap Year(閏年)! What's so special about that? Well, Leap Year happens only once every four years. And it has 366 days instead of the usual 365. In a Leap Year, we have 29 days in February, while in a usual year we have only 28 days.

　　Why do we have a Leap Year? We have a Leap Year so we can keep the calendar(日歷) in step with the seasons. The calendar is a kind of clock for the whole year. But how long is a year? A calendar year is 365 days. However, a true year is actually 365 days, 5 hours, 48 minutes and 46 seconds long. That's the time it takes the earth to travel around the sun. So every four years we have one more day, and we put it at the end of February, the shortest month of a year. Then we have a Leap Year.

1．How often can we have a Leap Year?

[　　]

2．What is a calendar? It is a kind of clock ________.

[　　]

3．How long does it take the earth to travel around the sun? It takes the earth ________ to travel around the sun.

[　　]

A．a(chǎn) day

B．a(chǎn) little longer than 365 days

C．a(chǎn) year

D．a(chǎn) month

4．Mrs Green was born on February 29, 1972. Now she is 32. How many birthdays has she had?

[　　]

5．Which of the following statements is NOT true?

[　　]

A．People who were born on February 29th are very lucky because they can have more birthdays than others.

B．Usually we have 365 days in a year.

C．There were 29 days in February, 1992.

D．The next Leap Year will be the year 2008.

　　Why is 2004 a special year? Because it is a Leap Year（閏年）! What's so special about that? Well, Leap Year happens only once every four years. And it has 366 days instead of the usual 365. In a Leap Year, we have 29 days in February, while in a usual year we have only 28 days.

　　Why do we have a Leap Year? We have a Leap Year so we can keep the calendar（日歷）in step with the seasons. The calendar is a kind of clock for the whole year. But how long is a year? A calendar year is 365 days. However, a true year is actually 365 days, 5 hours, 48 minutes and 46 seconds long. That's the time it takes the earth to travel around the sun. So every four years we have one more day, and we put it at the end of February, the shortest month of a year. Then we have a Leap Year.

[　　]

[　　]

[　　]

[　　]

[　　]

A．There were 29 days in February. 1992.

B．Usually we have 365 days ill a year.

C．People who were born on February 29th are very lucky because they can have more birthdays than others.

D．The next Leap Year will be the year 2008.