He is riding a bike
He _ ____ _ ___. is riding a bike
They are swimming
They ___ _______. are swimming
的分Q自分 演奏乐器: play the He is playing the quitar
He __ ______ the guitar. 演奏乐器:play the… is playing
She _is. playing the piano IG COM
She __ _____ the piano. is playing
She Is playing the erhu
She __ _____the erhu. is playing