按要求完成下列句子。(20分)
(1)It's about seven__hundred__kilometres.(就画线部分提问)
________ ________is it?
(2)北京有多大?
________ ________is Beijing?
(3)visiting,Daming,is,America(.)(连词成句)
_________________________________________________________________
(4)It's got eight million people.(英译汉)
_________________________________________________________________