—Why are you so happy, today? —Because I                    to London with my parents tomorrow.

— 　　　　 you 　　　　 out the physics problem, Kathy?— Not yet, but I’m going to.

He thought he ________ a teacher two years later. 

 The newly-designed iPhone 4S on the market____________ well now. Get one before it __________out in the shop.

 —Do John and Betty have a child？ —Yes. They _______ for twenty years.