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Teenagers are known for being creative and full of new ideas. Let¡¯s have a look at these teenage inventions that might change the world.

Banana leaves usually go bad in two or three days. Tenith Adithyaa, a teenager from India, used UV to make the leaves stay fresh for a year. Tenith thinks that one day the leaves will be used for making plates, cups and other things.

David Cohen, an American teenager, built an earthworm(òÇò¾) robot. It is able to go into the smallest places, where humans or dogs can¡¯t go. It will be used for finding people in a fire or an earthquake.

Remya Jose, a 14-year-old from India, found it tiring and boring to handwash clothes in the nearby river. She reused some bicycle parts and created a washing machine that saves time, energy and keeps people fit at the same time.

Kenneth Shinozuku, a 15-year-old from New York, noticed that his grandfather who got Alzheimer£§s disease£¨ÀÏÄê³Õ´ô£© would often leave home and get lost. So he invented the wearable sensors(¸ÐÓ¦Æ÷)to help people find their family members like his grandfather.

1.What is the passage mainly about?

A. Popular ads

B. Useful machines

C. Strange pictures.

D. Teenage inventions

2.The earthworm robot by David Cohen can ______.

A. make things stay fresh

B. help people wash clothes

C. go into the smallest places

D. take care of the old people

3.Which of the following is TRUE

A. Plates and cups are made of fresh banana leaves.

B. Remya's washing machine can also keep people fit.

C. David Cohen is a middle school student from India.

D. Kenneth's wearable sensors will keep old people at home.

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After two years physical training he was ______ and healthier.

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B. longer

C. stronger

D. shorter

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