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2009年英语专业四级真题
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.
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.
