Recent studies show that moderate amounts of alcohol are beneficial ( )health.

A. for
B. to
C. with
D. of

The ( ) between the rich and the poor becomes wider and wider nowadays.

A. space
B. opening
C. gap
D. separation

The cost of these complex operations is ( ) but poorly known.

A. considerable
B. sufficient
C. numerous
D. enormous

The earliest skis were ( ) ,consisting of short boards covered in fiir skins.

A. crude
B. coarse
C. rude
D. rough

The government is determined to ( ) the trade in illegal animal furs.

A. cease
B. call off
C. halt
D. pause

Consideration should ( ) arranging for a banker's guarantee in the firm'sfavor.

A. be given for
B. be given in
C. be given to
D. be given at

Employers ( ) skilled people on fixed-term contracts.

A. hire
B. lease
C. engage
D. rent

Environmental groups launched a ( ) against the widespread production ofgenetically modified crops.

A. struggle
B. campaign
C. conflict
D. battle

Even with the car windows left open a( ) , the temperature inside can reach120 degrees.

A. opening
B. crack
C. break
D. blank

“My job is killing me.”Who among us hasn't issued that complaint at least once? Now a new study suggests that your dramatic complaint may1some scientific truth.The 20-year study, by researchers at Tel Aviv University,2to examine the relationship between the workplace and a person's risk of death. Researchers3820 adults who had undergone a4physical exam at a health clinic in 1988, and then interviewed them 5detail about their workplace conditions—asking how nice their colleagues were, whether their boss was supportive and how much6they had in their position.The participants7in age from 25 to 65 at the start of the study and worked in a variety of8, including finance, health care, manufacturing and insurance. The researchers 9the participants through their medical records: by the study's conclusion in 2008, 53 people had died—and they were significantly more likely than those who survived to report having a10work environment.People who reported having little or no11support from their co-workers were 2.4 times more likely to die12the course of the study than those who said they had close, supportive13with their workmates. Interestingly, the risk of death was14only to people's perceptions of their co-workers, not their bosses . People who reported negative relationships with their supervisors were15likely to die than others.The study was observational, unlessit could not determine whether toxic workplace environments caused death, only that it was collaboratedwith the risk. But the findings add to the evidence whenhaving a supportive social network decreases stress and helps fostergood health. On the other hand, being exposed atchronic stress contributes to depression, ill health and death.