there are some books on the desk改为单数句
问题描述：
there are some books on the desk改为单数句
答
There is a book on the desk
答
this is a book on the desk
答
本人英语系，打包票答案是there is a book on the desk.
答
你好！
这道题的正确答案是：
There is a book on the desk.
课桌上有一本书。
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答
There is a book on the desk.
加油!不明白再问!