按要求改写句子。
（1）There are some photos on the wall. (改为否定句）
There        _______ photos on the wall
（2）There is a pear on the plate.（改为复数句）
There                                on the plate.
（3）There are two music rooms in our school. (对划线部分提问)
______  _______ music rooms are there in your school?
（4）There is a ball on the desk( 改为一般疑问句句）
______  ______ a ball on the desk?
（5）There are some books in the library.(改成单数句)
There                           in the library.