四级练习2012.09.02
[audio]http://sound.yywz123.com/tingbbs/cet4/cet420120902.mp3[/audio]A new study reports the common drug aspirin greatly reduces life threatening problems after an operation to replace blocked blood vessels to the heart more than (1)_______________. The doctors who carried out this study say giving aspirin to patients soon after the operation could save thousands of lives. People usually take aspirin(2)________________. Doctors also advise some people to take aspirin to help prevent heart attacks. About 10-15 percent of these heart operations end in death or damage to the heart or other organs. The new study shows that even a small amount of aspirin reduced such threats. The doctors said the chance of death for patients (3)________________. They claimed this was true if the aspirin was given within 48 hours of the operation. The doctors believe aspirin helps heart surgery patients because it can prevent blood from thickening and blood vessels from being blocked. However, the doctors warned that people who(4)_____________should not take it after heart surgery.
**** Hidden Message ***** 1. 800000 people around the world have this heart surgery each year
2. to control pain and reduce high body temperature
3. who took aspirin were 4 by 67%
4. have stomach bleeding or other bad reaction from aspirin
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