_______usually go to work on foot.（）

A．She

B．Their

C．They

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 ________.

This is my brother. ________ a good boy. （   ）

A．He’s

B．She’s

C．I’m

I boughtshe a present. （_____）改为__________
A B C

______ is getting cold. （   ）

A．It

B．Its

C．It’s