is the girl are playing the piano?这句话为什么要用are playing谢谢!

is the girl are playing the piano?这句话为什么要用are playing谢谢! （ ） the girl is playing the piano? how wonderfully you are playing the piano Who is the girl playing the piano on the square? The girl with_____they are playing is 13 years old The girl is playing the piano _the party,填什么?为什么? Is this girl playing the piano .作肯定回答 The girl is good at playing a piano. she is playing the piano.playing the piano划线提问 That girl is very excited about playing the piano.为什么excited Who is that girl (plays playing play is playing) the piano o —How wonderfully you are playing the piano!