Look!My sister is singing song.改一般疑问句并作肯定和否定回答

问题描述:

Look!My sister is singing song.改一般疑问句并作肯定和否定回答

Look!My sister is singing songs.
改一般疑问句:Is your sister singing songs?
作肯定和否定回答:Yes,she is .\ No,she isn't.