Part D

　　Directions：

　　Read thefollowing textfrom whwh lo words have been removed,Choosefrom the words A—-0 the most suitable one tofill each numbered gap in the text(46-55、.There are FlvE extra words that you do not need t0 use.Mark your answers on your ANSWER SHEET 1.

　　Just when you had figured out how to manage fat in your diet，researchers are now warning against another common mealtime pitfall(陷阱)--salt.

　　A study by researchers at the University of California，San Francisco(UCSF)，Stanford University and Columbia University shows that even a 46 decrease in daily salt intake(摄人) can lead to dramatic health benifit.The authors 47 an annual drop of as many as l20，000 cases of heart disease,66,000 48 of stroke and 99，000 heart attacks 49 by high blood pressure after a 3-9—per—day reduction in salt.

　　The advantages，not surprisingly，were greater for African Americans，who ale more likely to high blood pressure than other ethnic groups，and for the elderly，since blood vessels stiffen with age，which Call lead to higher blood pressure

　　“Everyone in the U.S.is consuming salt far in 51 of what is good for them，’’says lead author Dr.Kirsten Bibbins Domingo of UCSF.“What we are suggesting is that a population

　　wide effort to reduce salt intake，even 52 ，will have health benefits.’’

　　The team conducted a computer—based analysis to determine the 53

　　of a 3-g--per day reduction in salt intake on rates of heart disease and death.They also calculated the cost savings emerging from the amount of disease that would be 54 because of lower blood pressure. The conclusion：by cutting salt intake nationwide，the U.S.could save$10 billion to$24 billion 55 in health care costs.

　　[A]accidents[C]avoided[E]considerable

　　[G]documented[I]excess

　　[K]instances[M]revised

　　[O]undertakeannually caused develop dramatically