When a space shuttle has accomplished its _____, it can be ready for another trip in about two weeks.
—What’s the matter? It seems you’ve caught a cold. —Oh, I’m just too tired.
—Congratulationspassing your driving test! —Thank you.
Two days later, the fighting between the two countries left the area .
you go, you’ll find people working hard to rebuild their city.
We must keep on learning if we want to keep up with the of the changing times.