Dolphins are not fish. They are mammals. They live in groups and speak to each other in their own language. But they aren't the same as almost all land animals. Their brains are as big as men's and they live a long life--- at least 20 or 30 years.

Like some animals, dolphins use some sounds to help them find their ways around. They also use sounds to talk to each other and to help them find food. They don't use their ears to receive sounds, but use the jaws(下颚).

It's strange that dolphins are friendly to man, and for thousands of years, there are many stories about dolphins and man. In the 19th century, in a dangerous part of the sea near New Zealand, there was a dolphin. The seamen liked him very much and gave him a very good name, Jack. From 1871 to 1903, Jack met every ship in the area and showed it the way. In 1903, a passenger on a ship with the name of " The Penguin" shot and hurt Jack. Luckily the dolphin didn't die, and after a long time he was well again. He guided the ships through the area for nine more years, but he refused to help the ship " The Penguin".

Today, some people still kill dolphins, but more people in the world protect them.

根据短文内容,回答下列问题。

1.Are dolphins fish or mammals?

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2.What do dolphins use to receive sounds?

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3.Where did Jack live?

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4.Why did Jack refuse to help the ship "The Penguin"?

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5.How many years did Jack guide the ships through the area in total(总共)?

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If you see a problem, then you should try to work it out. Alex Knoll always thinks so. He is a 12-year-old boy from Post Falls, Idaho, in the United States.

Three years ago, a man couldn’t open a heavy door from a wheelchair. Alex saw it and wanted to help him find automatic doors.

However, there was no way for the disabled to look for such service. So he made an app called Ability App.

The app can help disabled people learn about access before they go somewhere. It gives information such as locations of wheelchair ramps and restaurants with Braille menus. Sometimes, people can also make friends using it.

Talk show host Ellen DeGeneres liked Alex’s idea. She had him on her show and surprised him with a $25,000(163,200yuan) to improve the app. Alex has yet to set a date for his app to come out. But he wants to make it happen as soon as possible.

1.What do we know about Alex Knoll?

A.He is 9 years old. B.Three years ago he couldn’t walk.

C.He often sits in a wheelchair. D.He likes to work out problems.

2.What can the disabled get from the Ability App?

a. They can learn where to use wheelchairs.

b. They can find out which restaurants have Braille menus.

c. They can use it to make friends.

d. They can use it to look for jobs.

A.abc B.abd C.acd D.bcd

3.What surprise did the host give Alex?

A.She asked Alex to be on her show. B.She gave Alex a lot of money to improve the app.

C.She set a date for the app to come out. D.She make Alex’s app become popular.

4.What does the story mainly tell us?

A.As long as you try, then you can solve any life’s problem.

B.This app is only used by the disabled people.

C.If you lend a hand, then, others would also help you.

D.It’s not easy for people with disabilities to live well.

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