how long this factory (开办)
I wonder how long ago this radio factory-----
how long do you stay at this factory 为什么不对?
How long has this factory been open这句话转变成这样可以吗
How long 什么 the factory 什么?
How long-this library-?
how long you this city
how long ______ this school?
how long can I ? this novel
How Long (Will This Love Last) 歌词
How long have you ________ this bike?
How long will this last? 是什么意思?
look !How long _____ like this ?