—No, it isn't. _______ is over there under the tree.
A:your; Mine
B:my; Your
C:her; Her
D:mine; Yours
一个多边形的内角和是外角和的3倍,则这个多边形是( )
——Mr. Li will check our homework this afternoon. ______ you _______ it?——Not yet. I'm doing it right now.