【应用】
(1)用所给单词的适当形式填空
①My birthday is on March (twelve).
②This is the (four) class today.
After that, we can eat lunch.
③February is the (two) month of a year.
(2)单项选择
①—This is my basketball.
—Oh, it's very new.
A. three
B. the third
C. third
D. the three
②There are months in a year.
Teachers' Day is in the month.
A. twelve; nine
B. twelfth; ninth
C. twelfth; nine
D. twelve; ninth
③My sister is years old. And today is her birthday.
A. fifth; fifth
B. five; fifth
C. fifth; five
D. five; five