完成句子。
根据所给提示，完成句子。
(1)Chen Ping has already finished her homework. (改为否定句)
Chen Ping her homework yet.
(2)The kid is playing the piano at the school music club. (对划线部分提问)
is the kid the piano?
(3)I made up my mind to study math well. (改为同义句)
I study math well.
(4)他代替我去了北京(完成译句)
He went to Beijing me.
