Jack, you’ve done your homework, ________ you?
I can’t tell when that house exactly, but it must be very long ago.
There are about more than five ___________ “left-behind” students (留守学生) in China.
Are you afraid of the dark? —Me? Oh, yes! I usually go to sleep _____ my bedroom light on. [ ]
Running every morning is good _____ your health. [ ]