Question

    Your brain controls everything you do. It makes it_________for you to think, learn, create and feel; to blink（眨眼） and breathe and for your heart to beat—this fantastic control center is your________ .

Can this small grey organ（器官）, which   _________ less than one and a half kilos, really do so much? Amazingly, your brain contains about 100 billion neurons（神经元）—it would _________you over 3,000 years to count them all. Believe it or not, the ________  in your brain never stops. Your neurons create and send more messages than all the phones in the world. And although one neuron_________only a little electricity, all your neurons together can _______ enough electricity to supply a light bulb（灯泡）.

So exactly how fast does your brain work? Well, imagine this: A bee lands on your foot. Neurons in your skin send this information to your brain_________a speed of more than 240  kilometers per hour. Your brain then uses  _________ neurons to send the message back to your foot to shake the bee off ________. These neurons can send this__________at more than 320 kilometers per hour. No computer has your brain’s unbelievable ability to deal with the amount of information coming from your eyes, ears and other sensory organs.

But how does your brain allow you________ things that you will use in the future?  The structure（ 结 构 ）of your brain changes every time you have a new_________, remember or learn something. For example, riding a bike seems impossible at first,   _________  soon you are able to do it. How? As you  practice, your brain ________“bike riding” messages again  and again.  Soon, the actions are learned and you are able to ride a bike easily from then on.

1.A.possible B.impossible C.polite D.impolite

2.A.mouth B.brain C.eye D.heart

3.A.works B.takes C.weighs D.grows

4.A.take B.cost C.spend D.pay

5.A.action B.electricity C.breath D.activity

6.A.creates B.invents C.discovers D.finds

7.A.provide B.protect C.produce D.become

8.A.in B.at C.with D.for

9.A.other B.another C.the other D.others

10.A.quickly B.quietly C.probably D.carefully

11.A.news B.product C.information D.purpose

12.A.to think B.to learn C.to use D.to change

13.A.mind B.sense C.feeling D.thought

14.A.so B.because C.and D.but

15.A.offers B.takes C.sends D.leaves

Answer

1.A

2.B

3.C

4.A

5.D

6.A

7.C

8.B

9.A

10.A

11.C

12.B

13.D

14.D

15.C

【解析】

文章主要介绍了人的大脑这个神奇的器官。大脑控制一切，它会让我们思考、学习、创造、感觉、眨眼、呼吸、心跳等，科学家把它称为“宇宙中最复杂的东西”，以及大脑是怎么工作的。

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