The traffic rule says young children under the age of four and __ _ less than 40 pounds must be in a child safety seat.
Please lock the door;______, bring the umbrella to me. It looks as if it is going to rain.
Success belongs to those who work hard. I firmly believe that, _____my own efforts, I can make it.
David, _____ I have been sharing a dorm for more than two years, is quite a funny guy.
--The mistake_____, I had been more careful. ---But you weren’t at that time.
---Excuse me, is this seat______? ---yes. Go ahead.