Is human blood all the same? “Yes，” you may say．“It's all red．”

Well，it's not as simple as you might think．

Blood is made up of different parts，such as red blood cells，white blood cells，and platelets（血小板）．

Two chemical molecules（分子）on the red blood cells make people's blood different．Scientists mark one molecule "A" and the other molecule "B".

According to which and how many molecules are on the red cell, scientists divide blood into four types: A, B, AB and O.

Your blood type will stay the same your whole life.

Scientists have been wondering if there are some links between people's blood type and their personalities but they don't know for sure yet.

  But some say that people with the same blood type may have things in common.

What's your blood type? Do you have family members or friends who are the same type as you? Read the following. Are you like this?

People with type A: They look peaceful from the outside. But they ask too much of themselves that they may be very nervous inside. They get happy or sad easily. Sometimes they are shy but always very careful. They can easily win people's trust.

People with type B: They have strong minds. Once they start a task, they don't give up easily. They'll try their best to finish it and do it well. Type B people always try to make themselves different from others. They want to do things in their own way in life.

People with type AB: They are maybe the strangest among all blood types. They can be both open and shy, noisy and quiet at the same time! They are responsible （负责的） and always ready to help others.

People with type O: They're open and good at making friends. They always start tasks but don't always finish them. They have lots of new ideas and love to be the centre of attention. They always strongly believe in themselves.

1. What's the main subject of this passage?

A．blood types                                      B．blood types and personalities

C．personalities                                      D．scientific research on blood

2. The blood types are decided by ____________.

A．the amount of white blood cells

B．the amount of platelets

C．the kind and amount of molecules on the red cell

D．the kind and amount of molecules on the white cell

3. Scientists are ________ about the relation between blood types and personalities.

A．not sure                    B．quite sure            C．excited               D．worried

4. If a person always tries to be different from others, he/she might have _________ blood.

A．A type               B．B type                C．AB type              D．O type

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

A．A person's blood type will never change throughout his life.

B．A person's blood type might have something to do with his/her personality.

C．A person with type O blood is usually confident.

D．A person with type A blood has the strangest personality.

The story is about a young student．She worked very hard at her lessons．She worked so hard that she became ill．She couldn't go to sleep at night．But when she got up the next morning, she felt very tired．
So she went to see a doctor．Hearing the student's words, the doctor said, "You are too stressed out．You must eat more yin foods like vegetables and tofu Besides（此外）, you can try to count numbers when you are lying in bed．By the time you count one thousand, you will be asleep（入睡）．I'm sure of it．"
The next day, the student came to see the doctor again．"Well," said the doctor, "How are you feeling today? "The student still looked tired．"Not very well," she said．" I tried to count one , two, three, four．, up to one thousand．But when I counted five hundred and sixty, I felt sleepy．I had to get up and drink some coffee so that（以便）I could go on counting up to one thousand．But then I still couldn't be asleep．
【小题1】Why couldn't the young student go to sleep?

The story is about a young student．She worked very hard at her lessons．She worked so hard that she became ill．She couldn't go to sleep at night．But when she got up the next morning, she felt very tired．

So she went to see a doctor．Hearing the student's words, the doctor said, "You are too stressed out．You must eat more yin foods like vegetables and tofu Besides（此外）, you can try to count numbers when you are lying in bed．By the time you count one thousand, you will be asleep（入睡）．I'm sure of it．"

The next day, the student came to see the doctor again．"Well," said the doctor, "How are you feeling today? "The student still looked tired．"Not very well," she said．" I tried to count one , two, three, four．, up to one thousand．But when I counted five hundred and sixty, I felt sleepy．I had to get up and drink some coffee so that（以便）I could go on counting up to one thousand．But then I still couldn't be asleep．

1.Why couldn't the young student go to sleep?

2.What did the doctor ask the young student to do?

3.What did the young student do after she felt sleepy?

4.What made the girl unable（不能） be asleep during the night after she went to see the doctor?

5.If you are a doctor, what will you ask the girl to do?

A．I will ask the girl to do more homework every day．

B．I will ask her to go to bed earlier．

C．I will ask her not to do so much homework

D．Both B and C．