You can’t imagine that a well－behaved gentleman ________ be so rude to a lady.

The 30th Olympic Games will be held inLondon aboutsix weeks this year.

Bill often makes us ___________, so we all like him.

It was_________Asimov was eleven years old________ his talent for writing became obvious

I _____ his telephone numberHad I known it, I would have rung him up