下列每组单词中，选出不同类一项。
（    ）1. A. swim B. play     C.  birthday
（    ）2. A. 2rd B. 4th    C. Sat.
（    ）3. A. me B. my     C. them
（    ）4. A. under     B. on C. dear
（    ）5. A. swimming  B. morning C. shopping

October is the _____ month. (    )

A．tenth

B．eighth

C．ninth

Mum, can I watch TV _________? (  )

A．one

B．first

C．the first

选词填空。
【小题1】There are ________ (twelve; twelfth) months in a year. December is the ________ (twelve; twelfth) month.
【小题2】Sunday is the ________ (one; first) day of a week.
【小题3】There are ________ (seven; seventh) days in a week.
【小题4】My birthday is in ________ (June; July). It’s the sixth month of the year.
【小题5】There are ________ (eleven; eleventh) girls in the game. Lucy is the ________ (eleven; eleventh).

把下列基数词改成序数词。
1、one__________________    2、two__________________
3、three__________________ 4、five__________________
5、eight__________________ 6、nine__________________
7、eleven__________________ 8、twelve__________________