You cut your food with this in_______ （美国）.

Reading Comprehension

　　People are wiser and can do more things than other animals because of their wonderful brains. We can talk, read, write, build houses, and invent things. Your brain has three main parts：the front brain, the hind brain, and the middle brain.

　　The front brain is the largest. It is gray outside and white inside. This is the part of the brain where you remember, think, and plan. With this part of your brain you make your arms and legs do what you want them to do. Here is where the messages from the eyes, ears, and nose let you see, hear, and smell. The hind brain is smaller than the front brain and is more like that of other animals. This part of the brain gives you balance and control of your muscles. You walk without tripping and skip without falling because the hind brain is doing its job. If it were not, you would lose your balance and fall over.

　　The middle brain is the smallest of all, but very important. It controls the beating of your heart, swallowing food, breathing, and other things you do without thinking. The middle brain is a small swelling where the brain joins the spinal cord——a large bundle of nerves in your backbone. The spinal cord is the main road to and from the brain. It comes into the middle brain bringing messages from all parts of your body. It also takes charge when some part of your body is in danger. If you touch a hot iron, the message to the spinal cord makes you pull your finger away even before you feel the pain of the burn. This is called a reflex. Never connect most parts of your body to the spinal cord.

1．The middle brain is ________.

[　　]

A．not as important as the front and the hind ones

B．more important than the two

C．as important as the two

D．more important than the hind one, but less important than the front one

2．Which brain controls your body when you run fast?

[　　]

A．The front.

B．The middle.

C．The hind.

D．Both A and C.

3．The spinal cord leads to your ________.

[　　]

4．Which part takes charge when you drink coffee?

[　　]

5．If you cut your finger, how can your brain know it?

[　　]

A．Your nerves will send the message to the brain.

B．Your heart will feel it and let your brain know.

C．When you see the blood, your eyes will send the message.

D．Your backbone will collect the message and send it to the brain.

Reading Comprehension

　　People are wiser and can do more things than other animals because of their wonderful brains. We can talk, read, write, build houses, and invent things. Your brain has three main parts：the front brain, the hind brain, and the middle brain.

　　The front brain is the largest. It is gray outside and white inside. This is the part of the brain where you remember, think, and plan. With this part of your brain you make your arms and legs do what you want them to do. Here is where the messages from the eyes, ears, and nose let you see, hear, and smell. The hind brain is smaller than the front brain and is more like that of other animals. This part of the brain gives you balance and control of your muscles. You walk without tripping and skip without falling because the hind brain is doing its job. If it were not, you would lose your balance and fall over.

　　The middle brain is the smallest of all, but very important. It controls the beating of your heart, swallowing food, breathing, and other things you do without thinking. The middle brain is a small swelling where the brain joins the spinal cord－a large bundle of nerves in your backbone. The spinal cord is the main road to and from the brain. It comes into the middle brain bringing messages from all parts of your body. It also takes charge when some part of your body is in danger. If you touch a hot iron, the message to the spinal cord makes you pull your finger away even before you feel the pain of the burn. This is called a reflex. Nerves conned most parts of your body to the spinal cord.

1．What is the main idea of the passage?

[　　]

A．How brains make people intelligent.

B．How your brain is connected with most parts of your body.

C．How the spinal cord in your body works.

D．How each part of your brain functions.

2．Which part takes charge when one is designing his research project?

[　　]

3．The spinal card leads to your

[　　]

4．What does the underlined word “that” in the second paragraph refer to?

[　　]

5．If you cut your finger, how can your brain know it?

[　　]

A．Your heart feels it and lets your brain know.

B．When you see the blood, your eyes will send the message to your brain.

C．Your backbone collects the message and sends it to the brain.

D．Your spinal cord collects the massage and sends it to the brain.

Have you ever been ill? When you are ill，you must be unhappy because your body becomes hot，and there are pains all over your body. You don't want to work，you stay in bed，feeling very sad.

　　What makes us ill? It is germs(细菌). Germs are everywhere. They are very small and you can't find them with your eyes，but you can see them with a microscope. They are very small and there could be hundreds of them on a very small thing.

　　Germs are always found in dirty water. When we look at dirty water under the microscope，we shall see them in it. So your father and mother will not let you drink dirty water. 

　　Germs aren't found only in water. They are found in air and dust. If you cut your finger，if some of the dust from the floor goes into the cut(割开处)，some of the germs would go into your finger. Your finger would become big and red，and you will have much pain in it. Sometimes the germs would go into all of your body，and you would have pain everywhere.

1.Which of the following is TRUE?

A. If things are very small，they are germs. 

B. If things can't be seen，they must be germs.

C. Germs are only in dirty water.     

D. Germs are everywhere around us. 

2.What is a microscope used for?

A. Making very small things look much bigger.

B. Making very big things look much smaller.

C. Helping you read some newspapers.

D. Helping you if you can't see things clearly. 

3.Why don't your parents let you drink dirty water?

A. You haven't looked at it carefully.　   B. Water can't be drunk in this way.

C. There must be lots of germs in it.　   　　D. Water will make you ill. 

4.Which of the following is NOT true?

A. Germs can be found both in water and in the air.

B. Germs can go into your finger if it is cut.

C. If your temperature is not OK，there must be germs in your body.

D. If your finger isn't cut，there aren't any germs on it. 

5.What's the main idea of the passage?

A. Germs may make us ill.　　　　    B. Germs are in dirty water.

C. Don't drink dirty water.　　　　     D. Take care of your fingers.