根据短文内容，完形填空。 (每空一词)
There are _______ (1) months in a year. Some months are _______ (2) and some months are
_______ (3). The long months are _______ (4), March, May, July, August, October and December.
They each (每个) have thirty-one days. The short months have _______ (5) days. _______ (6) are
April, June, September and November. _______ (7) has twenty-eight days, but it has _______ (8)
days once (一次) every four years, and the year is leap year (闰年). So there are 366 days in a leap
year. 2000 is a leap year. What about (...怎么样?) the year 2004?