阅读下面短文,根据其内容,完成表格中所缺的信息。

Not long ago, mobile phones were used mainly by business people and government officers in society. In the US, mobile phone users were about 350, 000 in 1985. Now there are 210 million mobile phone users in the US. Studies also show that over 50 percent of children in the US own their own personal mobile phones. The number of mobile phones users has also increased throughout the world. At the beginning of 2019, the number of total users jumped to 3 billion worldwide.

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 cause people and animals health problem. About 75 percent of mobile phone users don’t throw 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.

Mobile phones have valuable materials inside. The most valuable material is gold. They can be used again after recycling. If all of the waste phones in the US are recycled, it will save enough energy to offer over 194, 000 US families electricity for one year.

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 (熔化) down and separate parts of the phone, getting the valuable materials, such as gold and platinum.Plastic and glass can also be recycled from used mobile phones.

Mobile phone
【小题1】	◆The number of mobile phone users in America at preset is about【小题2】as much as that in 1985. ◆More than half of the children in America have their own personal mobile phones. ◆There are about 3 billion mobile phone users worldwide.
Mobile phone waste	◆Some people throw mobile phones away, which can be 【小题3】 ◆Three-quarters of the users keep the waste ones in their house. ◆Less than 20 percent of mobile phones are recycled.
Advantages of recycling	◆Recycling can keep【小题4】 resources(资源) . ◆Recycling can offer plenty of electricity.
How recycling 【小题5】	◆ Join working parts of broke or used phones together. ◆Melt down and separate parts of the phone to get valuable materials.