---What should I do  If I had a million dollars? --- If I ______ you, I would  give it to medical research.

______visited the Shanghai World Expo is sure to tell you the place is worth visiting twice.

There _______ a mother ,a father and three  children in the family. 

There __________ still some apple juice in the fridge. It’s not necessary for us to go to the supermarket now.

I, who ______ your close friend, will try my best to help you out of trouble.