If you put your history notes under your pillow (枕头) and sleep on them the night before an exam, will you do any better on the test? Most of us have hoped this might help. However, _______ can’t go through the pillow into your brain. But that doesn’t mean you can't learn while you sleep.

Scientists aren’t exactly sure how it works, but they have discovered that the brain can learn things during sleeping hours.

In one experiment(实验), researchers gave German speakers some Dutch words to learn. Then, they divided them into three groups. The researchers played Dutch words for people in Group 1 while they slept, without telling these German speakers what they were doing. The sound was low so it didn't wake them up, and only the newly introduced words were used.

Another group listened to the same words while they were awake. The researchers found the people in Group 1 were better able to identify(确认) and translate the words later. This was true only for the words that were played while they slept. The third group listened to words while they walked. The walkers did not have the same success remembering the words as the sleeping group.

The researchers later found that people had more slow-wave(慢波的) brain activity throughout the night. They said that more slow waves made people have better memory for the new words.

1.Which of the following words can be put into the blank?

A. ideas. B. dreams. C. knowledge. D. imagination.

2.In the experiment, the researchers played foreign words to people in Group 1 _______.

A. before they went to bed B. when they were sleeping

C. before they went to exercise D. when they were having dinner

3.Which of the following is TRUE?

A. People in Group 2 remembered the most words.

B. Listening while sleeping is good for people's sleep.

C. Slow-wave brain activity can help people have a good sleep.

D. People in Group 3 didn't remember the words as well as those in Group 1.

4.What's the best title for the passage?

A. People learn during sleeping hours B. Good sleep improves memory

C. How to keep your brain active D. How to memorize words

The most common disease in the world is the cold. It often starts with a sore throat . You sneeze and your nose runs. You usually have a headache, too. Often you have a cough later. It's not a serious disease, but you can feel quite bad. 

     There isn't a cure (良药) for a cold, but you can take some medicine to make you feel better. For example, you can take aspirin (阿司匹林) to get rid of (去除) your headache. It is good to rest. and to drink a lot of water, too. A doctor once told me."With the right medicine. a cold will last for seven days. With no medicine, it will go on for a whole week!"

A long time ago, people understood that some plants made them feel better. For example, the juice of lemons (柠檬) makes a sore throat feel better. In modern times, scientists have found out which chemicals (化学药品) are in them. Man, of our medicines today are made from those chemicals. There are some diseases that we can't cure yet. And nobody has found a cure for old age. But because of modern medicines, the average people now live longer than their grandparents.

1.A cold often starts with _______.

A. headache  B. a cough  C. a pain in your throat  D. feeling a little cold

2.What should we do when we catch a cold?

A. We only take some medicine. 

B. We should rest well, drink much water and have some medicine.

C. We just wait for a whole week. 

D. We only need a good rest.

3.What makes a sore throat feel better?

A. The medicine aspirin. B.A lot of water.

C. Something inside lemons. D. The root of a plant.

4.What is the real meaning of the doctor's words?

A. There is almost no medicine that can cure the cold. 

B. There is some medicine that can cure the cold. 

C.You will feel well after a whole week when you take some medicine.

D. The cold is a serious disease.

5.From the passage. which of the following is not TRUE?

A. You can feel quite bad though the cold is not a serious disease. 

B. We can get some medicine to get rid of our headache.

C. Even if you don't take any medicine, you will feel well after seven days. 

D. People have found a cure for old age.

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