[单项选择]A. Lowering the price of their newspapers.
B. Shortening their news stories.
C. Adding variety to their newspaper content.
D. Including more advertisements in their newspapers.

[填空题]Latitiude affects climate by lowering temperatures as the height above sea level increases.,

[单项选择]Unfortunately, any benefits gained by lowering prices never ______ if they are achieved by a reduction in quality.
A. last
B. pass
C. spend
D. retain

[填空题]Lowering the Risk of Heart Disease
Like millions of other Americans, I come from a family with a history of heart disease. My father had his first three heart attacks when he was only thirty-one. (46) I grew up with heart disease. It was there, but I didn’t take it seriously.
When I was thirty-one, my blood cholesterol (胆固醇) level was measured for the first time. It was 311 mg/dl, the doctor told me — an extremely high level that put me at a very high risk of heart disease, especially with my family history. He sent me to the National Institutes of Health (NIH) to be screened for participation in a clinical trial. (47) At NIH, physicians explained the degree of risk associated with my blood cholesterol level and the nature of the experiment. This test involves putting a tube through a leg artery (动脉) up to the heart. (48) Learning about the risks of the experiment as well as the risk associated with my raised blood cholesterol level

[单项选择]

Text 1
All that fault-finding about lowering cholesterol and eating less fat must finally be paying off. According to a study published in the New England Journal of Medicine, more Americans are eating a healthy diet now than 30 years ago. In tact, according to researchers from the University of North Carolina, just about the only people who ate right in the mid-1960s were poor black people, who simply couldn’t afford the steaks and high-protein meals that were then considered the most nutritious. According to survey data collected by the US Department of Agriculture, more than 16% of poor black people in 1965 ate a healthy diet, compared with less than 5% of high-income whites.
And what constitutes a healthy diet Less than 30% of calories from tat. Five or more servings a day of fruits and vegetables. Six or more helpings of legumes (peas and beans) and cereals. Exactly the diet that rich health-conscious people started adopting in the US i
A. 1960s
B. 1970s
C. 1980s
D. 1990s