Who is playing the piano in the next room?_______ is Li Ping’s brother.

The boy liking playing football is my brother.The boy who likes playing football is my brother.这两句都对吗 Who is playing the piano in the next room?_______ is Li Ping’s brother. the girl --------- is playing the piano is Millie.A whom B who C which D what The boy who is playing football is my cousin.中,who is 可以省略吗?（比如：I don't know the boy playing football there.） Who is that girl (plays playing play is playing) the piano over there选择括号中的哪个 He is the only one of the boys who enjoys playing basketball.怎样译? the tall man who is playing basketball is yaoming.为什么要加who 不加不是更容易理解? (the girls) are playing in the playground.对划线处提问用who is 还是who are He is one of the boys who ______(like) playing basketball. Listen!Who ___ in the next room.A.is playing the piano B.plays the piano C.is playing pianoD.plays piano 选择并语法说明 Who's playing with the white whales? who was playing with the ribbon? The boy liking playing football is my brother.The boy who likes playing football is my brother.第一句为什么不正确 ing形式不是可以做定语吗. Who is playing the guitar in the next room?jim ____.A.does B.is C.do The little girl ___ is playing the piano is my sister.A.what B.who C.which D.whom The musician who is playing guitar is my friend 为什么guitar前面不用加the希望大家不嫌分少 Who is playing the guitar in the next room?--Mike _.A.is B.does C.are D.do I’m playing the football in the playground .(对划线部分进行提问)划线是I'm 到底是Who is playing.?还是Who are playing.?这个句子变成一般疑问句,是Am I..?还是Are you.?