The producer comes regularly to collect the cameras _____ to our shop for quality problems.
Oh, it's you! I didn’t know you ___ here!
--I’m told that you are leaving for Shanghai. ----Who ____ so?
--I don't think you can manage it. ----That ____!
Is this the first time that you ___ late?
--You look so pale.What trouble you? ----I ___ my dead mother.