Question

Mobile phone history

Not long ago, mobile phones were used mainly by business people and government officers in society. In the US, mobile phone users were about 340,000 in 1985. Now there are 205 million  mobile phones users in the US. Studies also show that over 50 percent of children in the US own their own personal mobile  phones. The mobile phones explosion(激增) has led to a huge number of waste phones. The number of mobile phone users has also increased throughout the world. In the middle of 2005, the number of total users jumped to 2.4 billion worldwide.

Mobile phone waste

When people throw their mobile phones away, they usually end up in the open air. Mobile phones include some materials like lead, mercury and cadmium。 They can go into public drinking water and food and do harm to people’s health. About 75 percent of mobile phone users don’t know their phones away. Instead, they prefer to keep the waste ones sitting around the house as they are not worth very much. People are also afraid that others may know their information if they sell their waste phones. Less than 20 percent of them are recycled each year.

Benefits of recycling mobile phones

  Mobile phones have valuable materials inside. The most valuable material is gold, which is used in the phone circuit boards. Recycling can reduce greenhouse gas emissions(排放物) and keep natural resources like gold. If all of the waste phones in the US are recycled, it will save enough energy to offer over 194,000 US families electricity(电) for one year.

How mobile phone recycling works

  Many people do not know how mobile phone recycling works. One method of recycling mobile phones is to take the working parts of broken phones, then combine(使结合) them with the working parts of other used mobile phones to make one ready-to-use mobile phone. Another method of mobile phone recycling is to melt(融化) down and separate parts of the phone in order to get the valuable natural resources, such as gold and platinum. Plastic and glass can also be recycled from used mobile phones.

The used mobile phones
Mobile phone history	●Compared with the condition in 1985, there are1. mobile phone users at present. ●More than2. of the children in America have their own personal mobile phones. ●The mobile phone explosion has3. a huge number of waste phones.
Mobile phone waste	●Some materials, such as lead, mercury and cadmium in the mobile phones are4. to people’s health. ●Three-quarters of the users prefer to keep the waste phones sitting around the house5. of throwing them away.
Benefits of recycling	●Some materials are of great6.. They can be used again. ●It can7. plenty of electricity for American families if the waste phones are recycled.
How recycling8.	●One way is to join working parts of9. or used phones together. ●10. way is to melt down and separate parts of the phones to get the valuable natural resources.

Answer

1.more

2.half

3.caused

4.harmful

5.instead

6.value

7.provide

8.works

9.broken

10.Another

【解析】现在全世界的手机用户剧烈增长，于是就出现了一个问题，废旧手机的数目也越来越多了。手机中含有一些对人身体健康有害的东西，因此我们不能随便把他们扔掉，最好的方法就是回收手机中有用的材料，这样既对人体无害，还能节省能源。

1.根据短文中In the US, mobile phone users were about 340,000 in 1985. Now there are 205 million mobile phones users in the US.可知，在1985年，美国的手机用户是34万，现在是2亿零5百万，人数增多了，故应填more。

2.根据短文中Studies also show that over 50 percent of children in the US own their own personal mobile phones可知，研究表明在美国超过50%的孩子拥有自己的手机，由此可知，50%也就是一半，故这里填half。

3.根据短文中The mobile phones explosion(激增) has led to a huge number of waste phones.可知，手机数量的激增导致了大量废弃的手机。原文中lead to的意思是导致，这里填的cause也是导致的意思，这句话用的是现在完成时态，这里填的是过去分词caused。

4.根据短文第二段中Mobile phones include some materials like lead, mercury and cadmium。 They can go into public drinking water and food and do harm to people’s health可知，手机里的铅、汞、镉等材料可能对人们的健康导致伤害。原文中使用了短语do harm to…对…有害，这里空前是are，故应填形容词harmful。

5.根据短文第二段中About 75 percent of mobile phone users don’t know their phones away. Instead, they prefer to keep the waste ones sitting around the house as they are not worth very much可知，大约75%的手机用户不会把旧手机扔掉，相反的，他们把这些废弃的手机保存在家里。instead是副词，单独使用，常放在句首。这里是放在句中，和空后面的of组成了固定短语，instead of代替，而不是，后面跟名词或者动名词形式。

6.根据短文第三段中Mobile phones have valuable materials inside.可知，手机中有一些材料是很有价值的，原文这句话用形容词valuable做定语，修饰名词material。题目中使用的是短语be of +名词，相当于名词的形容词形式，故这里填名词value。

7.根据短文第三段中If all of the waste phones in the US are recycled, it will save enough energy to offer over 194,000 US families electricity(电) for one year可知，回收再利用手机中有用的材料，可以给美国的家庭提供电。这句话中的offer是提供的意思，跟这里填的provide同义，空前面有情态动词can，因此这里填动词原形。

8.根据短文最后一部分的标题How mobile phone recycling works可知，短文中的这一部分讲述的是手机回收是怎样运作的，由此可知这里应填works。

9.根据短文最后一段中One method of recycling mobile phones is to take the working parts of broken phones, then combine(使结合) them with the working parts of other used mobile phones to make one ready-to-use mobile phone.可知，回收手机的一种方法是把坏了的或者是废弃的手机中有用的零件结合起来制成一个待用的手机。由此可知这里应填的是broken，形容词，坏掉的。

10.根据短文最后一段中Another method of mobile phone recycling is to melt(融化) down and separate parts of the phone in order to get the valuable natural resources, such as gold and platinum可知，这里介绍的是回收手机的另一个方法， another另一个。