There are more 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(打哈欠) keeps our brains “cool”, which makes us think quicker.

Here are some pieces of advice to keep a good brain:

 Eat healthy food.

 Get a lot of playtime or exercise.

 Don’t drink or smoke.

 Use your brain a lot.

( )51. A British scientist found out that ________ could improve our memories.

A. drink B. dreams C. sleep D. bananas

( )52. According to the passage, if we want to have a good brain, we should ________.

A. use our brains more B. sleep fewer hours

C. work longer hours D. remember fewer things

( )53. Which of the following is TRUE according to the passage?

A. Our brains only work in the daytime.

B. Our brains need much energy every day.

C. Smoking can keep our brains healthy.

D. Getting exercise is good for our brains.

B

Do you now that animals have love for each other and their children just like us humans? Let me tell you some moving stories of great animal parents.

Several years ago a heavy rain hit a town and made the river go up. When the rain stopped, people found that a dog swam to an island in the river twice a day for two weeks. Why did she do so? Her four children were there. The mother swam there every day to feed her babies. This true story moved many people.

Another story is about chimpanzees(猩猩). A scientist named Jane Goodall spent 4 years living with chimpanzees in Africa. She found that chimpanzees also cared for those that were hurt or got lost. “It is not only humans who have duties, animals also do,” she said.

Two birds in Chengdu also showed their parental(父母的) love. Their baby was hurt and fell on the street in the center of the city. Cars were driving past but the brave parents rushed down to the road and took the little bird away with their claws(爪子).

( )54. After the heavy rain, the mother dog swam to the island ________.

A. to look for food B. to feed her babies

C. to move some people D. to carry things to her owner

( )55. The scientist found chimpanzees ________.

A. cared for the hurt or lost ones B. often left for a far place

C. always stayed in the same place D. didn’t care about each other

( )56. The two birds rushed down and took the little one away because ________.

A. they didn’t like their baby B. they were not kind enough

C. they wanted to teach their baby D. they wanted to save their baby

( )57. From the passage we know ________.
 

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