The conference has been held to discuss the ________of global warming on people’s lives all over the world.

In dealing with public relations, we should make every effort to prevent the______ in personality.

I can’t say which wine is best . It’s a(n) ______ of personal taste.

Measures _____to stop housing prices from rising too fast, but it remains to be seen whether they still work.

Lin Dan won the first prize in the Beijing Olympics, which helped him gain the ____ of the world.