写出下列单词的正确形式。
1. seven(序数词)---___________
2. student(复数形式)---_______
3. is(过去式)---_________
4. found(过去式)---_______

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).

There are some ______ on the table.  ( )

A．Knife

B．knifes

C．knives

I’d like some ______ and ______, please. ( )

A．chicken, chip

B．chickens, chips

C．chicken, chips

根据提示完成句子。
1. There are ________________ (20把椅子) in the classroom. 
2. The pencil box is ________ the desk. (在···上)
3. Steven is drawing on the ________.
4. ________ name is Li Ming. ________ is a boy.
5. —How many ________ are there? (55支铅笔)
—There are ________.