—Do you think_____ worthwhile to go all the way to Los Angles to buy that computer?—Well ,I’m going to visit some relatives, too. 

 I don’t think _____ possible to master a foreign language without much memory work.

You can't wear a blue jacket _____ that shirt — it'll look terrible. 

When I try to find ______that prevent so many people from taking part in the program, it seems to me that there are two main causes.

The confidence of the Chinese film makers _______by Avatar, the release of______ has not only set a good example for the Chinese film industry but also embarrassed our directors, who lack professional ethics.