There are five ______ under the desk. （   ）

A．book

B．shoe

C．footballs

There are some ______ on the table.  ( )

A．Knife

B．knifes

C．knives

There are three green ________ in the classroom. (    )

A．bag

B．boy

C．balls

We drank some_____ yesterday. (   )

A．drink

B．drinks

C．food

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).