Think about what you had for lunch: Was it a hamburger? A chicken sandwich? Barbecue? What about vegetables? Would it surprise you to learn that what you eat can affect the whole planet?

It can—in a big way. New studies show how food and its production affect the globe and its warming climate. You’ve probably heard of global warming : The temperature is on the rise because humankind has been releasing (排放) amounts of gases into the atmosphere. One of these greenhouse gases is carbon dioxide（二氧化碳）.

What does this have to do with food ? A big part of the carbon dioxide that we put in the atmosphere every year comes from the process of making and eating food. The production of meat contributes a lot of that carbon diode. And much of meat’s contribution comes from beef , which is responsible for releasing even more warming gases into the atmosphere.

The process of making a hamburger ,for example, requires a lot of energy. A cow has to be fed and raised on farmland, and cow waste is a major source of methane (沼气) — an especially powerful greenhouse gas. The cow has to be killed. The meat has to be processed (加工) and shipped to a shop, which takes fuel . Most of the cow won’t even be used for meat that people eat. By the time a hamburger finally lands on a dinner plate, it has made a heavy effect on the environment.

We can reduce the production of global-warming gases by eating less beef .Other kinds of meat like pork and chicken do less harm to the environment—at least in terms of the amount of greenhouse gases released. 

All kinds of meat are harder on the planet than vegetables. To grow and eat a pound of potatoes, for example, sends less than one-quarter pound of carbon dioxide into the air. So changing our diet to less meat and more vegetables, as it turns out, may do the world some good.

The questions asked in the first paragraph are used to _____.

A. show the author’s concern about food safety

B. express the author’s puzzlement at what to eat

C. remind readers of something delicious to eat

D. introduce the topic to be discussed in the passage

What is the bad news for meat-eaters?

A. Meat producing can cause global warming

B. Most cows are raised not for people to eat

C. There is a lot of carbon dioxide in meat

D. Animals begin to die off because of global warming

Which is the most environment-friendly food according to the passage?

  A. Beef                     B. Carrot               C. Pork                 D. Chicken

The author wrote the passage in order to _____.

  A. explain the importance of eating meat         B. advise people to keep a balanced diet

C. encourage people to choose a greener diet       D. introduce some healthy foods to people

Think about what you had for lunch: Was it a hamburger? A chicken sandwich? Barbecue? What about vegetables? Would it surprise you to learn that what you eat can affect the whole planet?
It can—in a big way. New studies show how food and its production affect the globe and its warming climate. You’ve probably heard of global warming : The temperature is on the rise because humankind has been releasing (排放) amounts of gases into the atmosphere. One of these greenhouse gases is carbon dioxide（二氧化碳）.
What does this have to do with food ? A big part of the carbon dioxide that we put in the atmosphere every year comes from the process of making and eating food. The production of meat contributes a lot of that carbon diode. And much of meat’s contribution comes from beef , which is responsible for releasing even more warming gases into the atmosphere.
The process of making a hamburger ,for example, requires a lot of energy. A cow has to be fed and raised on farmland, and cow waste is a major source of methane (沼气) — an especially powerful greenhouse gas. The cow has to be killed. The meat has to be processed (加工) and shipped to a shop, which takes fuel . Most of the cow won’t even be used for meat that people eat. By the time a hamburger finally lands on a dinner plate, it has made a heavy effect on the environment.
We can reduce the production of global-warming gases by eating less beef .Other kinds of meat like pork and chicken do less harm to the environment—at least in terms of the amount of greenhouse gases released. 
All kinds of meat are harder on the planet than vegetables. To grow and eat a pound of potatoes, for example, sends less than one-quarter pound of carbon dioxide into the air. So changing our diet to less meat and more vegetables, as it turns out, may do the world some good.
【小题1】The questions asked in the first paragraph are used to _____.

Think about what you had for lunch: Was it a hamburger? A chicken sandwich? Barbecue? What about vegetables? Would it surprise you to learn that what you eat can affect the whole planet?

It can—in a big way. New studies show how food and its production affect the globe and its warming climate. You’ve probably heard of global warming : The temperature is on the rise because humankind has been releasing (排放) amounts of gases into the atmosphere. One of these greenhouse gases is carbon dioxide（二氧化碳）.

What does this have to do with food ? A big part of the carbon dioxide that we put in the atmosphere every year comes from the process of making and eating food. The production of meat contributes a lot of that carbon diode. And much of meat’s contribution comes from beef , which is responsible for releasing even more warming gases into the atmosphere.

The process of making a hamburger ,for example, requires a lot of energy. A cow has to be fed and raised on farmland, and cow waste is a major source of methane (沼气) — an especially powerful greenhouse gas. The cow has to be killed. The meat has to be processed (加工) and shipped to a shop, which takes fuel . Most of the cow won’t even be used for meat that people eat. By the time a hamburger finally lands on a dinner plate, it has made a heavy effect on the environment.

We can reduce the production of global-warming gases by eating less beef .Other kinds of meat like pork and chicken do less harm to the environment—at least in terms of the amount of greenhouse gases released. 

All kinds of meat are harder on the planet than vegetables. To grow and eat a pound of potatoes, for example, sends less than one-quarter pound of carbon dioxide into the air. So changing our diet to less meat and more vegetables, as it turns out, may do the world some good.

1.The questions asked in the first paragraph are used to _____.

2.What is the bad news for meat-eaters?

3.Which is the most environment-friendly food according to the passage?

4.The author wrote the passage in order to _____.

Think about what you had for lunch: Was it a hamburger? A chicken sandwich? Barbecue? What about vegetables? Would it surprise you to learn that what you eat can affect the whole planet?
It can—in a big way. New studies show how food and its production affect the globe and its warming climate. You’ve probably heard of global warming : The temperature is on the rise because humankind has been releasing (排放) amounts of gases into the atmosphere. One of these greenhouse gases is carbon dioxide（二氧化碳）.
What does this have to do with food ? A big part of the carbon dioxide that we put in the atmosphere every year comes from the process of making and eating food. The production of meat contributes a lot of that carbon diode. And much of meat’s contribution comes from beef , which is responsible for releasing even more warming gases into the atmosphere.
The process of making a hamburger ,for example, requires a lot of energy. A cow has to be fed and raised on farmland, and cow waste is a major source of methane (沼气) — an especially powerful greenhouse gas. The cow has to be killed. The meat has to be processed (加工) and shipped to a shop, which takes fuel . Most of the cow won’t even be used for meat that people eat. By the time a hamburger finally lands on a dinner plate, it has made a heavy effect on the environment.
We can reduce the production of global-warming gases by eating less beef .Other kinds of meat like pork and chicken do less harm to the environment—at least in terms of the amount of greenhouse gases released. 
All kinds of meat are harder on the planet than vegetables. To grow and eat a pound of potatoes, for example, sends less than one-quarter pound of carbon dioxide into the air. So changing our diet to less meat and more vegetables, as it turns out, may do the world some good.

1. 1.

   The questions asked in the first paragraph are used to _____.

   1. A.
      show the author’s concern about food safety
   2. B.
      express the author’s puzzlement at what to eat
   3. C.
      remind readers of something delicious to eat
   4. D.
      introduce the topic to be discussed in the passage
2. 2.

   What is the bad news for meat-eaters?

   1. A.
      Meat producing can cause global warming
   2. B.
      Most cows are raised not for people to eat
   3. C.
      There is a lot of carbon dioxide in meat
   4. D.
      Animals begin to die off because of global warming
3. 3.

   Which is the most environment-friendly food according to the passage?

   1. A.
      Beef
   2. B.
      Carrot
   3. C.
      Pork
   4. D.
      Chicken
4. 4.

   The author wrote the passage in order to _____.

   1. A.
      explain the importance of eating meat
   2. B.
      advise people to keep a balanced diet
   3. C.
      encourage people to choose a greener diet
   4. D.
      introduce some healthy foods to people

   Many things ― genetics, environment, the food you eat, illness, sleep, even the seasons ― influence your emotional state. But at the heart of it is how you regard yourself. If you have a healthy level of self-esteem, you not only cope with life’s challenges better than people with low self-esteem, but you’re probably more content, confident, and successful. You’re probably also healthier. Studies show that positive self-esteem actually helps inoculate (为……做预防) people against depression and anxiety, conditions that may present increased risk of everything from colds to heart diseases.

   Most people’s good sense of worth is rooted in their childhood ― in the early approval(认可) of their parents, teachers, and friends. But as we get older, most of us judge ourselves by our sense of how effectively we’re managing in the world, especially in the areas of love and work. Our ability to love and to be loved can give us a sense of purpose and deep fulfillment. We can also find satisfaction and pride in work-related accomplishments and the people we meet and work with can reinforce our sense of self and our role in life. Once midlife comes along, however, our self-esteem can take a turn in response to changes in our lives. Marital（婚姻的） relationship may change, children may leave home , and we may begin to scale back our work as we approach retirement. Of course, the view in the mirror may not be what it used to be, either.

   If you find your self-esteem eroding a bit, try to build it up again. As the saying goes, it’s better to try something and fail than to be successful at not trying anything . Focus on goals that are linked to activities you’re really interested in, so you’ll enjoy a sense of purpose and gain pleasure from the pursuit（追求） whether or not you achieve your goal in full.

52. According to the passage , all of the following factors may affect our emotion, EXCEPT ______.

    A. our self-esteem         

 B. our physical conditions 

 C. our dreams    

D. our surroundings

53. If a child is often scolded, when he grows up he may ______, according to the passage.

     A. become a successful person

  B. have enough confidence

C. get some diseases easily

D. have a low sense of worth

54. According to the second paragraph , we can know that ______.

   A. our childhood always has a bad effect on our self-esteem

B. our self-esteem will not change throughout our life

C. successful experiences may enhance one’s self-worth

D. self-confidence is the most valuable treasure in one’s life

 55.The author wrote the article to ______

     A. criticize some scientists’ new ideas

B. suggest developing healthy self-esteem

C. advise struggling for great ideas.

D. recommend ways to avoid diseases