March is the________ month of the year. (  )

A．four

B．three

C．third

用所给词的正确形式填空。
【小题1】They visited “The World of Robots” on the __________ (two) floor.
【小题2】Alice is good at dancing. She is a good __________ (dance).
【小题3】Peter __________ (buy) a model plane yesterday.
【小题4】He __________ (can) eat five hamburgers a day ten years ago.
【小题5】Horses can run very __________ (fast).

My cousin’s birthday in on the _________of October.(   )

A．three

B．first

C．two

Jane was first, and Mary second. Ann came . （   ）

A．last

B．second

C．first

two的序数词是 .  (   )

A．twost

B．twoth

C．second