The U.S. official said North Korea --- and Iran --- should follow in the steps of Libya, which last December said it would work__________ to allow international weapons inspectors to do their work. 

—On Sundays I prefer shutting myself in and listening to music all day on Sundays.—That’s      I don’t agree. You should have a more active life.

. Dream of the Red Chamber is _____ worth _____ because we can learn a lot about the noble families in the feudal society.

     , I got better and returned to work.

Noise is unpleasant, _____ when you are trying to sleep.