变句式.There is a radio on the desk.(改为一般疑问句） The football is b

变句式.
There is a radio on the desk.(改为一般疑问句）
The football is behind the door.（就划线部分进行提问）
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There are some pictures on the wall.（改为否定句）
There is a coat on the bed.(用three　coats　替代a　coat　改写句子）
There are a banana and some books in your bag.(单句改错）