Is there a trash bin in your reaon?
Yes,there is. No,there isn`t.
There is not a trash bin in my reaon.
There is no trash bin in my reaon
Are there any curtains in your clossroom?
Yes,there are. No,there aren`t.
There aren`t any curtains in our clossroom.
There are no curtains in our clossroom.
你的题目中的单词coutains应该是curtains吧,curtain是窗帘的意思.