How long have you been in America?——I was five横线中应填什么

How long have you been in America?——I was five横线中应填什么 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 China?——Since last Wednesday 啥意思 how long have you been —— this school?为什么不用On 用in? —How long have you been here?—For about 10 years,And I _____ 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 Hello,I _______ you ______ in London.How long have you been Hello!I _____ you _______ in London.How long have you been h "How long have you been