根据实际情况用适当的数词填空。（填英文）
1. There are _______________letters in English alphabet (字母表).
2. There are _______________ days in a week.
3. There are _______________ hours in a day.
4. There are _______________ days in a year.
5. Thursday is the _______________ day of the week.
6. There are _______________ days in January.
7. There are _______________ months in a year.
8. _______________is Christmas Day.
9. There are _______________ seasons in a year.
10. There are _______________ days in February 2008.