[单项选择]Passage One
For decades, heart disease has had the honor of being the leading killer of Americans. Most heartrelated deaths happen among the elderly. But a new study finds that an alarming portion of heart failure cases are occurring in a much younger group, especially among African Americans.
In the first large-scale study to document the extent of the race gap in heart disease, researchers report that one in 100 black adults develop heart failure in their 30s and 40s-a rate 20 times higher than that of similarly aged white adults. "What these data point out is that it’s important to recognize that disease patterns differ in different populations," says Dr. Kirsten. "We would have completely missed this at-risk group had we only been looking at older age groups."
The new report is a large government-funded survey. The aim of the study was to document the frequency of heart disease among young adults, so researchers recruited more than 5,000 volunteers a
A. heart disease is no longer the leading killer of Americans
B. heart disease can be well controlled at a younger age
C. chances of developing heart disease are equal among the young and the elderly
D. African Americans are more likely to develop heart disease at a younger age

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[单项选择]Passage One
For decades, heart disease has had the honor of being the leading killer of Americans. Most heartrelated deaths happen among the elderly. But a new study finds that an alarming portion of heart failure cases are occurring in a much younger group, especially among African Americans.
In the first large-scale study to document the extent of the race gap in heart disease, researchers report that one in 100 black adults develop heart failure in their 30s and 40s-a rate 20 times higher than that of similarly aged white adults. "What these data point out is that it’s important to recognize that disease patterns differ in different populations," says Dr. Kirsten. "We would have completely missed this at-risk group had we only been looking at older age groups."
The new report is a large government-funded survey. The aim of the study was to document the frequency of heart disease among young adults, so researchers recruited more than 5,000 volunteers a
A. Black adults in their 30s and 40s.
B. White adults in their 50s and 60s.
C. One hundred black adults.
D. African Americans.

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[单项选择]
Passage One

For three decades we’ve heard endlessly about the virtues of aerobic(increasing oxygen consumption)exercise. Medical authorities have praised running and jumping as the key to good health, and millions of Americans have taken to the treadmill(踏车) to reap the rewards. But the story is changing. Everyone from the American Heart Association to the surgeon general’s office has recently embraced strength training as a complement to aerobics. And as weight lifting has gone mainstream, so has the once obscure practice known as "Super Slow" training. Enthusiasts claim that by pumping iron at a snail’s pace-making each "rep" (repeat) last 14 seconds instead of the usual seven you can safely place extraordinary demands on your muscles, and call forth an extraordinary response. Slow lifting may not be the only exercise you need, as some advocat
A. has been misunderstood for decades
B. has been widely accepted recently
C. has been the basis of weight lifting
D. has become the nucleus of aerobics

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[单项选择]Although he has had no formal education, he is one of the（）businessmen in the company.
A. shrewdest
B. sternest
C. nastiest
D. alertest

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[单项选择]One impact that the burning of （　） fuels has had on the Earth’s environment has been the increase of carbon dioxide in the earth’s atmosphere.
A. vehicle
B. oil
C. gas
D. fossil

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[填空题]My father has had one of his (tooth)（）taken out.

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[填空题]My father has had one of his (tooth) ______ taken out.

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