Apples are usually sold by ________ weight and eggs are sometimes sold by ________ dozen.
Parents must take good care of their children, _____ they?
He must be in the reading-room, _____ he?
It was 4:25 a.m. _____ the ambulance arrived to take the body of Miss Lee.
It was years _____ I had visited my hometown in Dalian, Liaoning Province.
Not until _____ his shoes did he enter one of the rooms of the Japanese house.