Unit 13 We're trying to save the earth 阅读能力拔高练（原卷版) -2021-2022学年九年级全册英语干货拔高秘课（人教版）

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Unit 13 We're trying to save the earth!

Should we be afraid of sharks? Maybe not. Some scientists do some research about the causes of

shark attacks（袭击）and say that sharks don’t like the taste of humans! In fact, most people who

were attacked didn’t die. They usually received only one bite（咬伤）. Why is this?

There are many explanations（解释）of why sharks sometimes attack people. One is that sharks are

just curious.

We know that sharks are the strongest animals in their environment, so they are not afraid of

anything. It means they are curious when they see something unusual. Because they don’t have hands

or feet, the only way they can learn about an object is to bite it. It is thought that sharks sometimes

bite humans for this reason, and then swim away.

Scientists also say that sharks don’t want to waste energy trying to eat a human, because we have

a lot of bones（骨头）. It is hard for a shark to eat us because sharks don’t have hands, and they

can’t pull the meat off our bones. Maybe that’s why they only bite us once.

Another guess is that sharks attack humans by mistake. Some sharks, such as the great white sharks,

may sometimes mistake humans for a seal（海豹）. People lying on the sea looks like seals when

seen from below. Sharks like seals because they are fat and delicious.

No matter why shark attacks on humans, sharks should be afraid of us. Sadly, we kill almost 40

million of them each year.

1．The underlined word “curious” means “______” in Chinese.

A．好奇的 B．恐惧的 C．激动的 D．烦躁的

2．What might sharks think of humans?

A．Friendly. B．Strong. C．Not delicious. D．Convenient to eat.

3．Why does the writer say sharks should be afraid of humans?

A．Because humans have hands and feet.

B．Because many sharks are killed by humans.

C．Because their living environment is polluted by humans.

D．Because there are more humans than sharks in the world.

4．What would the author write the passage mainly for?

A．To tell surfers to stay away from sharks.

B．To ask people to stop killing sharks.

C．To let us know the reasons for shark attacks on people.

D．To show that humans are much stronger than sharks.

Air pollution is a big problem for cities in most countries. Many people are dying from it. But

how can we tell the air quality is good or bad?

On a tree next to a river in Amsterdam, a tiny birdhouse glows (发光) bright green when the air

is clean. If you're standing nearby, the birdhouse will also give you a free Wi-Fi connection—but only

if pollution level is low enough. The designer is Joris Lam. His birdhouse tells you about the air

quality.

Joris’ birdhouse is called TreeWifi. It can be put on a tree around your house to test the air

quality. People can see a screen with information about the local air quality and how to improve it.

TreeWifi is a simple way for people to know about the air pollution around them. If the birdhouse

does not glow, people should care more about the environment. It reminds them to change their

lifestyles. For example, to protect the air, they can ride bikes or just walk instead of driving cars.

“Imagine if trees gave free Wi-Fi, people would plant more trees like crazy. It's a pity that they

only give us the oxygen(氧气) we breathe,” Joris said.

The birdhouse doesn't work as a home for birds now. Joris and his team are trying to make some

changes to it. In the future, they hope birds will live in the birdhouse and the heat of its green light

will be used to keep birds warm in winter.

5. What does the underlined word “it” in Paragraph 1 refer to?

A. The birdhouse.

B. Air quality.

C. Air pollution.

6. People can get a free Wi-Fi connection when .

people are standing nearby ①

the pollution level is low enough②

the air quality is low enough③

A. ①② B. ②③ C. ①③

7. Joris designed a screen for the birdhouse to .

A. receive the free Wi-Fi connection

B. protect the birdhouse from the rain

C. show information about the air quality

8. In the future, the birdhouse will also be used .

A. as a home for birds

B. to tell us the weather

C. to give us the oxygen

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Unit 13 We're trying to save the earth 阅读能力拔高练（原卷版) -2021-2022学年九年级全册英语干货拔高秘课（人教版）.docx

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Unit 13 We're trying to save the earth 阅读能力拔高练（原卷版) -2021-2022学年九年级全册英语干货拔高秘课（人教版）

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