Allen has decided that he will be an engineer by the time he ________ twenty.

Father finally came back home, which I ___ forward it.

—Tomorrow ____ my birthday. I’d like you and Jane to come.  —I’m not sure if she ____ free. 

—I________as a cashier for 10 straight years, but I never had a sense of achievement.—Is that why you set up your own business?

Don’t call me at 9:00 o’clock tomorrow morning ,when I          a lecture at Harvard.