句型转换those are their pencil cases.

问题描述:

句型转换those are their pencil cases.
1.Those are their pencil cases.改为一般疑问句,并作否定回答.
2.就划线部分提问.
The children are _at_ _home_ today.(at home 划线)
this is a math book.(a math book)

Are those their pencil cases?
No,those aren't.
Where are the children today/
What is this?