There are lots of dangerous and terrible insects in Northeastern India, but the tree-bees are the most terrible. They are killers. Unlike most bees which will sting (叮咬) you only if they are disturbed (打扰), tree-bees will attack you in thousands for no reason. And they will chase (追赶) you for your life.

Walking along a dusty road while I was on holiday there last year. I found myself, without the least warning, the centre of such an attack. The air above me suddenly became thick with bees. Though it was hot, I went cold all over. Until then I had never heard of Indian tree-bees, but I had recently seen a film called “The Angry Swarm”, which was about killer-bees.

I began running to the village about half a mile away, but I was soon covered from head to foot with bees. I drove them away with my hands, only to make room for others. Each time I opened my mouth for breath, more bees entered my mouth, until it was stung to twice its usual size and I could hardly breathe.

When I reached the village, I found some workers building a house. I ran towards them for help. But as soon as the workers saw the bees with me, they ran for safety at top speed.

Soon my eyes had completely closed. I fell into a pile of brick dust. I pushed myself wildly down into it until my head and shoulders were covered. And then I tried hard to get out of the dust, the angry bees made a new attack on me. I was tired out and ran weakly about in circles. Soon I lost my consciousness (意识).

Later I learned that two quick-minded villagers ran to a pile of dry grass and quickly surrounded (包围) me with a thick wall of fire and smoke until the bees were driven away. They stayed with me, taking stings out of my body for the next three hours until a doctor came and gave me further treatment.

1.What can we infer (推断) from the second paragraph?

A.The temperature went down at that time.

B.The air suddenly became thick because of the dust.

C.The writer knew Indian tree-bees were the most dangerous.

D.The writer felt scared when he was surrounded by tree-bees.

2.In which order did the following things happen to the writer?

a. He tried to drive away the bees but failed.

b. He was surrounded with a thick wall of fire and smoke.

c. He was tired out and lost consciousness later.

d. He watched a film named “The Angry Swarm”.

e. He was attacked by tree-bees while taking a walk.

A.e-a-c-b-d B.d-e-a-c-b C.e-b-a-d-c D.d-e-a-b-c

3.Which of the following is NOT true according to the passage?

A.Tree-bees often attack people in large numbers.

B.Tree-bees can be driven away by fire and smoke.

C.Tree-bees do not give up easily when they attack people.

D.Tree-bees will not attack people unless they are disturbed.

Many people think of the brain as a mystery. They don’t know much about intelligence and how it works. When they do think about what intelligence is, many people believe that a person is born smart, average, or dumb—and stays that way in the whole life. But new research shows that the brain is more like a muscle(肌肉)—it changes and gets stronger when you use it. And scientists have been able to show just how the brain grows and gets stronger when you learn.

Everyone knows that when you lift weights, your muscles get bigger and you get stronger. A person who can’t lift 20 pounds when he/she starts exercising can get strong enough to lift 100 pounds after working out for a long time. That’s because the muscles become larger and stronger with exercise. And when you stop exercising, the muscles shrink(收缩)and you get weaker. That’s why people say “Use it or lose it!”

But most people don’t know that when they practice and learn new things, parts of their brain change and get larger a lot like muscles do when they exercise. Inside the cortex(皮层)of the brain are billions of tiny nerve(神经元)cells(细胞),called neurons. The nerve cells have branches connecting them to other cells in a complicated(复杂)network. Communication between these brain cells is what allows us to think and solve problems. When you learn new things, these tiny connections in the brain actually multiply and get stronger. The more you challenge your mind to learn, the more your brain cells grow. Then, things that you once found very hard or even impossible to do —like speaking a foreign language or doing algebra(代数)—seem to become easy after learning them for a period of time. The result is a stronger, smarter brain.

Scientists started thinking that the human brain could develop and change when they studied animals’ brains. They found out that animals that lived in a challenging environment were more “perspicacious”—they were better at solving problems and learning new things.

1.According to the first paragraph, .

A.the function(作用)of our brain is like that of the muscle

B.until now it’s impossible to explain the brain’s mystery

C.many people believe one’s intelligence is naturally determined(决定)

D.one’s brain grows stronger as the age increases

2.What is Paragraph 3 mainly about?

A.The complicated structure of the brain.

B.How changes in the muscles affect the brain.

C.The importance of the brain.

D.How the brain becomes stronger by learning new things.

3.What does the underlined word “perspicacious” in the last paragraph probably mean?

A.Strong. B.Smart. C.Popular. D.Active.

4.The paragraph that follows the passage will most probably talk about .

A.the differences between animals’ brains and humans’ brains

B.the relation between human brains and muscles

C.scientists’ findings about animals’ brains

D.how to make your brain smarter through self-development

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