__does it take you to go by bus from Tianjin to Beijing?— About five hours.[ ]

Is this ________ dictionary? —No, _____ isn’t _______ dictionary.

What were you and your sister doing when the telephone rang?— I while my sister was eating.

What’s this ____________? — It is a map.

Miss Fang is ______ English teacher. ________ is a good teacher.