神奇的大脑

                                                                                       

Brain is working day and night. If you learn words before going to bed, a certain part of the brain may help you remember the words while you sleep. 
There are many interesting things about the brain. Your brain uses less energy than a fridge light. Just two bananas can give the brain enough energy to work for a whole day.    
According to some scientists, yawning keeps our brains "cool", which makes us think more quickly. Besides, people should eat healthy food, not drink or smoke, and use their brains a lot. 

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1.If you learn words before going to bed, what may the brain help you to do while you sleep?　　

A The brain may help you sleep well.

B The brain may ask you to get up early.

C The brain may make you study hard.

D The brain may help you remember the words.

解析：选D。细节理解题。根据第一段第二句If you learn words before going to bed, a certain part of the brain may help you remember the words while you sleep. 可知如果你在睡觉前学习单词，大脑的某个部分可以帮助你在睡觉的时候记住这些单词，故选D。

2.Your brain uses ____energy than a fridge light.

A less

B more

C huger

D stronger

解析：选A。细节理解题。根据第二段第二句Your brain uses less energy than a fridge light.可知你的大脑消耗的能量比冰箱里的灯还少，故选A。

3.How many bananas can give the brain enough energy to work for a whole day?

A Just one banana.

B Just two bananas.

C About three bananas.

D More than three bananas.

解析：选B。细节理解题。根据第二段第三句Just two bananas can give the brain enough energy to work for a whole day.可知仅仅两根香蕉就可以给大脑足够的能量工作一整天，故选B。

4.According to Paragraph 3, _____ keeps our brains "cool".

A yawning

B sleeping

C drinking

D smoking

解析：选A。细节理解题。根据第三段第一句According to some scientists, yawning keeps our brains "cool", which makes us think more quickly.可知有些科学家认为，打哈欠让我们的大脑“清醒”，这让我们思考得更快，故选A。

5.Which of the following is NOT true?

A People should eat healthy food.

B People shouldn’t drink or smoke.

C People shouldn’t have breakfast.

D People should use their brains a lot.

解析：选C。细节理解题。根据第三段最后一句Besides, people should eat healthy food, not drink or smoke, and use their brains a lot.可知除此之外，人们应该吃健康的食物，不抽烟、不喝酒和多用脑，C项没有提到，故选C。