Many people agree that there has never been a more splendid opening ceremony than______ of the Beijing Olympic Games in history.

Tom Hopper got his work _____ in the filming industry for his film had been crowned best picture at the Oscars.

As an experienced teacher, your teaching methods have to be _________enough to meet the demands of different students.

Mr. Smith used to smoke ____, but he has given it up.

Overpopulation is a terrible threat to the human race.Yet it is probably ____ a threat to the human race than environmental destruction.