who_____ it be that knows several languages

who_____ it be that knows several languages ____he 's very young ,____he knows several languages 句型转换 We find that it is difficult to learn several languages I hear that he knows three languages well.同义句( ) ( ) ( ）that He knows so much about the stars that I am sure it would be 英语翻译If he succeeds,he knows that it will be a difficult jour When your father knows that,you'll be in for it.有道翻译查出的意思：看紧 The novel was said into several languages. ______,lenin knew several foreign languages he can speak several _____ (other) languages jack knows many other languages __________ English It seems that he knows everything.为什么要it开头?