Air pollution is obviously one of the major _____ of city life.

Don’t get off the bus （ ） it has stopped completely.

Encouragement is sometimes much more_____than criticism.

（ ） he often forgot their wedding anniversary greatly annoyed his wife.

As a Chinese proverb goes， a heavy snow _____ a good harvest year.

It is her beautiful eyes （ ） attract most of the fans.

Most computer users are （ ） threat from computer viruses．

There are two spare rooms in the building; neither of （ ） has been provided with modern facilities.

The young man lost his job last month, but it wasn’t long _____ he found a new position in my company.

Any student who_____his homework is unlikely to pass the examination.

He said he would never be intimidated （ ） what he didn’t like by big names.

Many teenagers feel no difficulty （ ） computer.