Theory comes from practice为什么不能用exercise

Theory comes from practice为什么不能用exercise 9.Theory comes from ____(A.practice ,B.practise). Theory comes from practice has long been proved.改错 Mike comes from America. first comes from 中文 Jim comes from USA.( )- comes back from w . PR PR pr. 改为定语从句:The apartment is very tall,we live in it.改为定语从句:The apartment is very tall,we live in it.The boy comes from England,his name is Tom.Few people understood his theory.His theory was very difficult.用no sooner...than改 He comes from Geimany .(疑问句) she comes from America对吗? He comes from America是什么意思 You love comes from where? Real knowledge comes from practise. Real Knowledge comes from practica . Art never comes from happiness