You should return the digital camera to Sally ________she will get angry.
Bob and David are friends. __________ of them work in the art club as volunteers.
Which of the following is the official mascot(吉祥物) of the 2014 FIFA World Cup?
Jenny, I can’t go hiking with you __________ I have to help my mum with housework.
—___________ did you buy your e-dictionary, Frank?—Two days ago.
—Thank you for the nice birthday present.—_____________.