Advantages and Disadvantages of Mobile Phones
Nowadays, nearly everyone has a mobile phone. In our daily lives we make phone calls to others, and we need to send messages to exchange information. Now, you can surf the Internet by using your mobile phone. I have to say that I enjoy using my phone, but I am worried at the same time: Is it healthy and safe to use?
Mobile phones have many advantages. Firstly, we keep in touch with people by using them. Because of our busy life, we have little time to meet friends and our beloved ones. Thanks to mobile phones, we can tell them how everything is going. When an emergency happens, we can call for help using our phones. It is convenient and important in our lives.
But every coin has two sides and it is the same with mobile phones. As people are used to making phone calls, they are spending less and less time with their family and friends. Phones give them more excuses to stay out of reach. Because of the convenience, the love and care between people has changed into a few words in a message or a phone call. For students, there are more chances to get distracted(分心的) from their lessons. When I was in middle school, I often looked out of the window to rest my eyes, but now I spend those moments on my phone.
In the end, I hope you can think about the advantages and the disadvantages, and use your mobile phone correctly. We humans created mobile phones, and we should keep them under control.
【小题1】According to the second paragraph, we spend little time with friends because       .

Advantages and Disadvantages of Mobile Phones

Nowadays, nearly everyone has a mobile phone. In our daily lives we make phone calls to others, and we need to send messages to exchange information. Now, you can surf the Internet by using your mobile phone. I have to say that I enjoy using my phone, but I am worried at the same time: Is it healthy and safe to use?

   Mobile phones have many advantages. Firstly, we keep in touch with people by using them. Because of our busy life, we have little time to meet friends and our beloved ones. Thanks to mobile phones, we can tell them how everything is going. When an emergency happens, we can call for help using our phones. It is convenient and important in our lives.

    But every coin has two sides and it is the same with mobile phones. As people are used to making phone calls, they are spending less and less time with their family and friends. Phones give them more excuses to stay out of reach. Because of the convenience, the love and care between people has changed into a few words in a message or a phone call. For students, there are more chances to get distracted(分心的) from their lessons. When I was in middle school, I often looked out of the window to rest my eyes, but now I spend those moments on my phone.

 In the end, I hope you can think about the advantages and the disadvantages, and use your mobile phone correctly. We humans created mobile phones, and we should keep them under control.

1.According to the second paragraph, we spend little time with friends because       .

A. we have mobile phones                        B. our lives are comfortable

C. we are shy                                   D. we are always busy

2.What does the underlined word “emergency” in the second paragraph probably mean?

A. A worrying and dangerous situation              

B. An expected event.

C. An important thing.                         

D. A funny and exciting moment

3.Which of the following ways of expressing love and care is NOT mentioned in the passage?

A. Visiting each other.                             B. Making phone calls

C. Sending messages.                            D. Writing letters.

4.What’s the author’s purpose in writing this passage?

A. To tell us the disadvantages of using mobile phone.

B. To advise us to use mobile phones correctly.

C. To list all the advantages of using mobile phones.

D. To explain why many people don’t use mobile phones.

Advantages and Disadvantages of Mobile Phones
Nowadays, nearly everyone has a mobile phone. In our daily lives we make phone calls to others, and we need to send messages to exchange information. Now, you can surf the Internet by using your mobile phone. I have to say that I enjoy using my phone, but I am worried at the same time: Is it healthy and safe to use?
Mobile phones have many advantages. Firstly, we keep in touch with people by using them. Because of our busy life, we have little time to meet friends and our beloved ones. Thanks to mobile phones, we can tell them how everything is going. When an emergency happens, we can call for help using our phones. It is convenient and important in our lives.
But every coin has two sides and it is the same with mobile phones. As people are used to making phone calls, they are spending less and less time with their family and friends. Phones give them more excuses to stay out of reach. Because of the convenience, the love and care between people has changed into a few words in a message or a phone call. For students, there are more chances to get distracted(分心的) from their lessons. When I was in middle school, I often looked out of the window to rest my eyes, but now I spend those moments on my phone.
In the end, I hope you can think about the advantages and the disadvantages, and use your mobile phone correctly. We humans created mobile phones, and we should keep them under control.

1. 1.

   According to the second paragraph, we spend little time with friends because       .

   1. A.
      we have mobile phones
   2. B.
      our lives are comfortable
   3. C.
      we are shy
   4. D.
      we are always busy
2. 2.

   What does the underlined word “emergency” in the second paragraph probably mean?

   1. A.
      A worrying and dangerous situation
   2. B.
      An expected event.
   3. C.
      An important thing.
   4. D.
      A funny and exciting moment
3. 3.

   Which of the following ways of expressing love and care is NOT mentioned in the passage?

   1. A.
      Visiting each other.
   2. B.
      Making phone calls
   3. C.
      Sending messages.
   4. D.
      Writing letters.
4. 4.

   What’s the author’s purpose in writing this passage?

   1. A.
      To tell us the disadvantages of using mobile phone.
   2. B.
      To advise us to use mobile phones correctly.
   3. C.
      To list all the advantages of using mobile phones.
   4. D.
      To explain why many people don’t use mobile phones.

There are several advantages in planting trees：they firm the soil，soak(渗透) up extra water and take carbon dioxide out of the atmosphere. However，it now turns out that planting trees could add to global warming. We all know that tree roots do a great job of keeping soil firmly on the ground and out of the wind's power. The problem is that some of the dust clouds play an important part in soaking up carbon dioxide.

Huge dust storms blow out over the oceans from  dry parts of North Africa and Central Asia. Tons of dust are lifted and left as a thin film over the ocean surface.

Dust from China is carried east and left in the Pacific Ocean. If a tree­planting programme there is successful and the dust supply reduced, the net result may be that less carbon dioxide gets locked away in the ocean.

Andy，an environmental scientist has spent the past few years studying dust and says his work shows clearly the complexity of the system. For this reason the need is to focus on cutting carbon dioxide giving off rather than doing anything else.

Robert, an American scientist, has  shown that when native grassland areas are invaded by trees, carbon is lost from the soil. “We are studying why the soil carbon disappears，but one theory is that trees do a lot more of their growing above ground compared to grass, so less carbon goes directly into the soil from trees.” said Robert.

In wet areas of the world, the gain from trees absorbing carbon dioxide above ground seems to be outweighed by the loss of carbon from the soil below ground.

Countries that plan to fight against global warming by planting trees may have to think again. Solutions to environmental problems are often more complex than they first appear，and understanding the Earth's climate is a very great challenge.

60．People usually hold the opinion that ________.

A. huge dust storms can destroy carbon dioxide

B. planting trees could reduce global warming

C. huge dust storms can destroy the oceans on the Earth

D. planting trees is the only way to control huge dust storms

61．Andy, an  environmental  scientist, believes  that________.

A. environmental problems are more complex than expected                 

B. trees shouldn't have been planted in dry places

C. dust plays a more important part than trees

D. carbon dioxide is harmful to everything

62．Robert's experiment proves that ________.

A. trees absorb more carbon than grass

B. carbon can turn grass into dust

C. less carbon can make trees grow faster

D. grassland areas should be covered by forests

63．The best title for this passage is “________”．

A. The importance of planting trees

B. The dust clouds soak up carbon dioxide

C. Is it really useful to plant trees to reduce global warming?

D. Why the soil carbon disappears