Would you take my old TV in _______ for this camera?
Bob looked back only to find an old classmate whose name ________ him for the moment.
If better use is ________ your spare time,you’ll make good progress in doing your business.
Many scientists have believed that there may be a _________of life on the Mar.
Steve Jobs’ death _______ quickly and soon became the talk of the whole world.
I think the English song is _________ worth _________ again.