There are some offices on the stadent floor.(改成单数)
问题描述：
There are some offices on the stadent floor.(改成单数)
What is mother?(否定)
Where is the box?(否定)
This is my classment(复数)
She teachers in English.(复数)
We offen play with_______(they)（注：这一句是根据后面的形式,写出相应的单词）
答
there is an office on the stadent floor
It is not mother.
there isn't a box
These are my classmates.
they teach English.
We often play with them.