Many students today suffer from ________ problems, since they are under too much pressure.

A. recreation-related B. pollution-related

C. stress-related D. pollution-free

He stumbled(绊倒)on the _______ ground and fell flat on his face.

A. undeniable B. unfair C. unavoidable D. uneven

People are advised not to smoke at home, since passive smoking is ________ to people around them. Which is Not proper for the blank?

A. dangerous B. protective

C. hazardous D. risky

The environmental organization calls on customers not to purchase these _______ packages of food, clothes and gifts.

A. intrusive B. cognitive

C. excessive D. sensitive

Jack’s house has been broken into twice and now he takes________ against theft

at any time.

A. risks B. chances C. turns D. precautions

We can broaden our horizons through _________ to new things.

A. hazard B. exposure C. recreation D. vapor

It is ______ that the noise around us is a(n) _______ to our health and well being.

A. preventable; precaution B. denial; existence

C. undeniable; hazard D. vital; culprit

The school offers many _____ activities for the local students.

A. infectious B. recreational

C. fragile D. vocational

If you are from doing something, you are officially prevented from doing it.

A. seeped B. dispersed C. bombarded D. banned

Since Tom downloaded a virus into his computer, he cannot open the file now.

A. constantly B. accidentally

C. deadly D. eventually