—The authors of computer viruses are geniuses.—I agree. If they applied their wisdom to other net technology        human beings can benefit, it would be better.

_______ has recently been done to provide more buses for the people, a shortage of public vehicles remains a serious problem.

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. 

Your composition is well-written ____ a few spelling mistakes.

.Heavy drinking used to be acceptable, but as drunken driving has caused so many tragedies public opinion is no longer________.