选择 Are you ( )tu music.A hear B hearing C listen D listening

选择 Are you ( )tu music.A hear B hearing C listen D listening
2.---what is she doing
----( )
A ,She is sleep B ,She is catch the mouse.C,She is fly a kite D,She is reading
3,Look,the boy ( )basketball.
A,play B.are play C,is playing D,played
最好能说明理由