I.用所给词的正确形式填空。
1. The _____(one) month of a year is January.
2. –How often do you go swimming in summer?
--________(two) a week.
3. September is the ___(nine) month of a year.
4. One _______(five) of the world population is in China.
5. There are _______(eighteen) floors in the building and my home is on the ______(eighteen) floor.
6. There ar e ________(hundred) of teachers in our school.
7. My name is Jack Smith. Jack is my _______(one) name.
