把there's a bag in the desk,there's an erasr in the pencil-box改成一般疑问句.

问题描述:

把there's a bag in the desk,there's an erasr in the pencil-box改成一般疑问句.
还有there are two rulers near your book.

Is there a bag in the desk?
Is there an erasr in the pencil-box?
Are there two rulers near your book.