用“Is there……?”,“Are there……?”,“There are······.”,“There is······.”各造两句话.

Is there anyone in the room?
Is there a book on the desk?
Are there any pencils in that pencil-case?
Are there any tomatoes in that bag?
there is a toy on the bed.
there is a pen on the desk.
there are many potatoes in the supermarket.
there are some vegetables in the kichen.