关于完成时的选择题hello i () you () in london,how long have you been

Hello,I _______ you ______ in London.How long have you been Hello!I _____ you _______ in London.How long have you been h hello!i___you ___in London .how long have you been here? Hello,Mike.I _ you _ in beijing.How long have you been here? Hello,I( )you( ) in shenyang.How long have you been here?A,h I ___ you____ in London .how long have you been here? Hello!I__you___in Tokyo.How long have you been here? How long have you been in China? How long have you been in China How long have you been for china与How long have you been in c how long have you been in与how long have been to的区别,还有how lon "How long have you been