完成句子。（每空1分，共8分）
根据所给提示，完成句子。每空一词，含缩略词。
小题1:Chen Ping has already finished her homework. (改为否定句)
Chen Ping ___________ ____________ her homework yet.
小题2:The kid is playing the piano at the school music club. (对划线部分提问)
_____________ is the kid ____________ the piano?
小题3:I made up my mind to study math well. (改为同义句)
I ____________ ____________ study math well.
小题4:他代替我去了北京(完成译句)
He went to Beijing __________ __________ me.
