2009年英语专业四级真题.docVIP

PART I CLOZE [15 MIN.] Scientists around the world are racing to learn how to rapidly diagnose, treat and stop the spread of a new, deadly disease. SARS -- Severe Acute Respiratory Syndrome was (31) ____ for the first time in February 2003 in Hanoi, (32) _____ since then has infected more than 1,600 people in 15 countries, killing 63. At this (33) _____, there are more questions than answers surrounding the disease. Symptoms start (34) _____ a fever over 100.4 degrees F, chills, headache or body (35)____. Within a week, the patient has a dry cough, which might (36) _____ to shortness of breath. In 10% to 20% of cases, patients require (37)_____ ventilation to breathe. About 3.5% die from the disease. Symptoms (38)____ begin in two to seven days, but some reports suggest it (39) ____ take as long as 10 days. Scientists are close to (40) ____ a lab test to diagnose SARS. In the meantime, it is diagnosed by its symptoms. There is no evidence (41)____ antibiotics or anti-viral medicines help, (42) _____ doctors can offer only supportive care. Patients with SARS are kept in isolation to reduce the risk of(43) ____ Scientists arent sure yet, but some researchers think its a (44) ____ discovered corona virus, the family of viruses that cause some common colds. Most cases appear to have been passed (45) ____ droplets expelled when infected patients cough or sneeze. Family members of infected people and medical workers who care (46) ____ them have been most likely to (47) ____ the illness. But recent developments in Hong Kong suggest that the (48) ____ might spread through air, or that the virus might (49) ____ for two to three hours on doorknobs or other (50)____. Health experts say it is unlikely, though, that sharing an elevator briefly with an infected person would be enough to pass the virus. (1) A. detected B. caught C. disclosed D. revealed (2) A. but B. and C. or D. yet (3) A. time