题目内容
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B. to; with
C. to; of
D. for; with
Feeling lonely can make you sick. Doctors have long known that loneliness can cause many health problems and even death. What they didn’t know is 16 this feeling causes illness. A study in the online magazine Genome Biology 17 that loneliness actually influences the important part of our bodies—our genes.
In a small population of patients, researchers 18 more than 20,000 genes to compare how the genes of lonely and non-lonely individuals (个体) express themselves in molecular processes (分子过程) and in personal health. They found that gene expression is 19 in chronically (长期地) lonely people. “We now have a new way for understanding the relationship 20 social experience and physical health,” explains the study’s lead author, Steve Cole of University of California, Los Angeles.
“This study—the first to link (联系) 21 with gene changes—is special and exciting,” says Emma Adam, a professor of human development at Northwestern University. “It 22 in the black box.”
According to John Cacioppo, an author of the study from the University of Chicago, the
work suggests that loneliness is a warning 23 , much like physical pain. “This feeling is so bad because 24 of us wants to be forgotten; that’ s also what human means,” he says. “It makes us 25 for other people and want to be with friends when we’re lonely.”
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Sugar—free beets(甜菜)that still taste sweet, tastier tomatoes and brighter-colored fruits and vegetables that stay ripe(熟的)longer are all foods that are being grown now. How can they
carry traits, such as being tastier, brighter, and riper? They are genetically engineered.
Genetic engineering(基因工程)is like making a change in a recipe. For example, when you make cakes, you mix together all of the usual ingredients. If you add an extra ingredient, like salt, the cakes will taste differently.
Genes are ingredients in the recipe for life. They carry the traits of living things. Your genes dictate what color hair and eyes you’ll have, how tall you’ll be, as well as many other traits. Genes carry traits for plants, too. By adding genes to a plant, you can sometimes create new traits. For example, adding a certain gene to a potato plant can make the potato plant distasteful to bugs(虫子). This makes some farmers happy because they don’t have to use chemicals to keep bugs away from their plants.
It sounds great, but some people are opposed to the idea of food that is genetically engineered. Ronnie Cummins, from the Campaign for Food Safety, is against it. He says that one of the major concerns is allergies(过敏). Supermarkets don’t always label foods that are genetically engineered. A customer could unknowingly buy food that has an added gene from another plant that he or she is allergic to. It could be dangerous.
Gary Burton from Monsanto, a seed(种子)company that engineers food, disagrees. He says his company tests for allergies. Burton believes that genetic engineering is a valuable tool for making better food. The technology can help farmers use less insecticide(杀虫剂)and grow healthier crops. Burton thinks there are many advantages.
But Cummins says that we just don’t know what will happen in the future if we keep adding genes to foods. We could mistakenly create a monster.
People have different opinions about genetic engineering. One side supports it and thinks it will only help us. The other side is opposed to playing with nature and fears health risks. Which side do you think is right?
【小题1】What could be a good thing about food that is genetically engineered?
| A.It’s more expensive. |
| B.It could taste different. |
| C.It requires less insecticide. |
| D.It’s not labeled in the supermarket. |
| A.People from seed companies. |
| B.Farmers who use engineered seeds. |
| C.People from the Campaign for Food Safety. |
| D.Scientists who create genetically engineered food. |
| A.growing genetic foods will make farmers richer |
| B.people will eat more genetic foods in the future |
| C.using fewer chemicals could make the food tastier |
| D.there could be unknown dangers about genetic foods |
| A.Future Farming |
| B.Genetic Engineering |
| C.Foods with a Difference |
| D.Genetically Engineered Fruits |