There is a picture on the wall.改为一般疑问句,并作否定回答
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there is a piano in the classroom(改为一般疑问句并作否定回答〕ther...答:补充一楼第一题! 1. Is there a piano in the classroom? No, there isn't. 2. There aren't any students in the library. 3. How many basketballs are there in the box?