Yes.We have to say we are now facing unexpected difficulties ahead, but we finally believe nothing can stop us from serving the people heart and soul, _______?

Better go to see your sick colleague right now, ______ you? 

—_____ will you come back, Mum?—In ten minutes.

No one asked for me while I was out, ___?

--- __________ are you so happy?--- Because it is my birthday.