Are you still worried about how to get your phone charged(充電)? Now, a 19?year?old teenager can help you to solve this problem. He has invented a phone charger which uses energy from your own body to charge your phone.

Hand Energy, the wonderful invention of the inventor Michael Vaga, allows you to charge your phone simply by shaking your hand, which starts the charger's gyroscope(陀螺儀) to produce electricity. And the electricity can then either be stored or used to charge a mobile immediately(立即).

He said, “With each rotation(旋轉(zhuǎn)) of your hand, the gyroscope's speed increases quickly and produces more power. The average(平均的) speed of the gyroscope is about 5，000 rounds per minute. With this small charger, your physical energy can be turned into electrical energy and this means you can charge your phone. ”

Hand Energy can help you produce endless electricity. You can use it everywhere you want. It is especially useful for people who have to spend a long time in the wild. What's more, it's friendly to the environment and helps you to exercise your wrists. It takes between 40 minutes and one hour to fully charge the batteries(電池) in Hand Energy.

The invention took Vaga a year to develop. Now, the inventor from Minsk, Belarus, is ready to put it into production and send out the creative convenient chargers.

1.The energy of the new charger comes from ________.

A. the sun B. your body C. the batteries D. your phone

2.If we want to produce energy with the charger, we should ________.

A. shake our hands B. move quickly

C. go to the wild D. charge our phone

3.Who will be the most interested in the invention?

A. The teachers. B. The medical workers.

C. The drivers. D. The field workers.

4.It is not clear whether ________ or not, according to the passage.

A. the more you shake, the more power it produces

B. the charger helps to protect the environment

C. we can buy the charger online in China

D. it will produce endless electricity

5.Which of the following could be the best title of the passage?

A. A wonderful invention B. A great inventor

C. An interesting story D. A piece of exciting news

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