—It is ridiculous (荒唐的) that so many people believe the world will disappear in 2012.—__________ it is true?
The young lady is ______ a beauty; she is ______ than pretty.
It’s just foolish to spend all your money on ______ such as playing football.
Tom ate a big cake only a few minutes ago. ______ he is not hungry.
______ we gave him something to eat, he would save it up for his little sister.
--All students must hand in your exercises right now.-______ We don’t have enough time to finish them.