[单项选择]Many police officers are putting themselves--and the public--at risk by failing to address their sleep problems and excessive fatigue, a new study in the Journal of the American Medical Association suggests.
"Of the nearly 5,000 officers surveyed, 40% screened positive for a sleep disorder, and four out of five of these individuals were undiagnosed and untreated," says lead author Dr. Charles A. Czeisler, a professor of sleep medicine at Harvard Medical School, in Boston. "This is a very important clarion call (号召,召唤) to initiate these kinds of workplace screening programs,not just in police forces but in workplaces throughout the nation."
The study is the first to examine the rate of sleep disorders among police. The participants weren’t necessarily representative of police officers as a whole, nor did the study include people in other professions. The rate among the officers in the study, however, was much higher than those seen in the general population, Dr. Czeisler says.
A. Police officers are inflicted with health problems.
B. Sleep disorders pose a great threat to public health.
C. Police officers deny their sleep problems and fatigue.
D. Sleep-deprived police officers may endanger the public.

[单项选择]Many police officers are putting themselves--and the public--at risk by failing to address their sleep problems and excessive fatigue, a new study in the Journal of the American Medical Association suggests.
"Of the nearly 5,000 officers surveyed, 40% screened positive for a sleep disorder, and four out of five of these individuals were undiagnosed and untreated," says lead author Dr. Charles A. Czeisler, a professor of sleep medicine at Harvard Medical School, in Boston. "This is a very important clarion call (号召,召唤) to initiate these kinds of workplace screening programs,not just in police forces but in workplaces throughout the nation."
The study is the first to examine the rate of sleep disorders among police. The participants weren’t necessarily representative of police officers as a whole, nor did the study include people in other professions. The rate among the officers in the study, however, was much higher than those seen in the general population, Dr. Czeisler says.
A. Health problems have aroused national concerns.
B. People in workplaces are more stressful than police officers.
C. Sleep disorders may not be confined to police officers.
D. Sleep problems have become an occupational disease.

[单项选择]Four Colombian police officers are dead and at least five more wounded after leftist rebels ambushed a police patrol in the _______ part of the country.
A. northwestern
B. southwestern
C. northern
D. southeastern

[单项选择]Police officers caught the （） outside a shopping center on the afternoon of March 14th.
A. offence
B. offensive
C. offend
D. offender

[单项选择]It was a holiday weekend. The police officers were sitting in a hot room (56) in-structions(指示)from their captain. One of these officers (57) Ed Williams. He and ten other officers were on special (58) because they knew that two weeks (59) over 400 people had died from accidents (60) by drivers. Over 4,000 people had received seri-ous injuries, all caused by drunken drivers. The (61) would try their best to prevent (62) accidents before they happened.
Joe Forest was (63) himself at a family party. It was getting late and Joe told his sister that he was (64) . Joe’s sister asked him to stay and wait a few hours (65) he drove. "Don’t worry. I’m going to be fine. I’m going to drive slowly. I only had a few (66) ," Joe said.
Officer Williams was at his post (67) the passing cars. A green car was coming, (68) from left to right. Officer Williams stopped (69) and told Joe to get out. He as
A. enjoying
B. helping
C. drinking
D. eating