The human body is a machine that can raise lots of interesting questions．Why，for example，are yawns（呵欠）contagious（传染的）？What's up with ice﹣cream headaches？ Here are answers to these and other questions about our bodies．
Why do I get a headache when I eat ice cream too quickly？
Scientists aren' t exactly sure what causes the brain freeze when we eat ice cream or other super﹣cold foods too quickly，though some believe it's the result of changed blood flow in the nervous stem．Blood vessels in the head tighten to stop the loss of body heat and then relax to let blood flow rise；that sudden rush of blood is what causes the headache．You can improve an ice﹣cream headache by rapidly rubbing your tongue across the roof of your mouth to help warm up things．
What causes my stomach to make a low continuous noise when I'm hungry？
Actually，your stomach makes noise whether you're hungry or full；you just hear it more clearly when you're hungry．Think of your digestive tract（消化道）as a really long tube lined with smooth muscle tissue． These muscles move food，fluids and gas through your digestive tract． A ．It can make you feel embarrassed（尴尬的） but is nothing to worry about．
Why do I blush when I'm embarrassed？
When you're embarrassed，your brain releases a shot of adrenaline（肾上腺素），which makes your heart race and blood vessels become larger in size．All this happens to increase blood flow and oxygen delivery throughout the body in a fight﹣on﹣ flight reaction（对抗反应）．There are a lot of tiny blood vessels in your face，which turn noticeably redder from this sudden rush of blood．As for the actual function of blushing，researchers are still trying to find that one out．
Why are yawns contagious？
Have you ever yawned in front of someone，only to have them yawn right back？ It's a common thing but researchers don't have a good explanation for it．They do，however，know this happens only with humans and chimpanzees（ 黑猩猩）．A bigger question puzzling scientists is why we yawn at all It used to be thought that yawning showed that oxygen to the brain was not enough，but that's just a myth．A growing body of research now shows that yawning is nature's way of keeping our brains cool．
（1）What is the meaning of the underlined word tighten？ ．
A．变松
B．变紧
C．变短
D．变长
（2）Which of the following sentences can be filled in the blank？ ．
A．And that's what you're hearing when your stomach makes noise．
B And that's why you're so hungry when your stomach is empty．
C．And that's what makes you feel uncomfortable when you're full．
D．And that's how it makes a difference to your digestive tract．
（3）Which of the following statements is TRUE？ ．
A．There is no way for you to improve an ice﹣cream headache．
B．Researchers have found out the actual function of blushing．
C．Your stomach makes noise only when you are hungry．
D．Researchers don't have a good explanation for why yawns are contagious．
（4）What is the best title of the passage？ ．
A．Some Interesting Facts
B．Our Strange Body
C．Some Useful Discoveries
D．Our Amazing Feelings
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New Street
Bridge
Street
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This is a picture of a classroom. The classroom is big and clean. You can see a teacher’s desk, five desks and six chairs. You can see a girl and a boy, too.
Three books are on the teacher’s desk. A pencil case is on the desk. Two pens and two rulers are in the pencil case. A schoolbag is behind a chair. A ball is on the floor.
The girl is Gina. She is eleven. The boy is Bob. He is twelve. They are in Class Two, Grade One. They are good friends. Their teacher is Miss Green. But she is not here.What’s the picture of?
| A．Boys and girls | B．Desks and chairs | C．pens and pencils | D．A classroom |
Where are the two pens?
| A．They’re in the pencil case |
| B．They’re on the teacher’s desk |
| C．They’re behind the chair |
| D．They’re on the floor |
Who is eleven?
| A．Gina | B．Bob | C．Mike | D．Helen |
Who is their teacher?
| A．Mr. Green | B．Mrs. Green | C．Miss Green | D．Miss Gao |
Are Gina and Bob good friends?
| A．No, they are | B．No, they aren’t | C．Yes, they are | D．Sorry, I don’t know |
Who (谁) lost a watch?
| A．Betty | B．Jim | C．Bruce | D．David |
Is the ring Betty’s?
| A．Yes, it is. | B．No, it isn’t . | C．Yes, this is | D．No, it is David’s. |
What color is Jim’s new watch?
| A．Green. | B．White. | C．Black. | D．Red. |
Who can you call for the backpack?
| A．Betty | B．Jim | C．Bruce | D．David |
What’s Bruce’s phone number?
| A．678- 4219 | B．892- 0231 | C．708- 5209 | D．291-2084 |
Confidence is very important in daily life. It can help you to develop a healthy attitude （态度）.A study shows that the people who are more confident are much happier. They can have more chance to make themselves successful. But how to be more confident? Here are some suggestions:
·Speak loud When you are not confident, you can't do well what you want to do. You speak in a voice so low that other people can hardly hear you. Try to speak loud enough so that people can hear you clearly. The .high voice can help you become more confident.
·Play sports Physical exercise makes you tired but completely relaxed. [3] A strong body helps you be full of confidence.
·Encourage yourself Write down a list of things you did during the day to see how many things you have done well. Did you finish your homework? Did you tell a joke that made everybody laugh? Give yourself praise for the good things you've done.
·Get rid of （消除） fear Fear comes along with failure （失败）. But it's easy to overcome （克服） if you know that failure is part of your life. Don't hide your head just because you said something stupid last time. Try to start again and believe you can do better.
·Pick up a hobby If you like singing, sing as much as you can. [4] In some ways, a hobby can make you outstanding. And it will make you happy and confident.
A．根据短文内容简要回答问题。How many suggestions can help you to be more confident?
____________________________________________________________How to encourage yourself?
____________________________________________________________
B．将短文中划线的句子译成汉语。____________________________________________________________
____________________________________________________________
C．请给短文拟一个适当的标题。____________________________________________________________
Sam woke up suddenly. Someone was moving around in the next room. “Maybe it’s his grandmother, getting a glass of water,” he told himself. But the next room was the living room. It wasn’t near the kitchen. Sam’s parents were away, and there was only his grandmother in the house with him. He looked at his watch. It was three thirty! Too early for his grandmother to get up!
He got out of bed and opened the door very quietly. The window was open. A man was standing near it and looking in the dark drawers. His grandmother kept her money there! He thought quickly. Yes, the radio! He turned it on and a man’s voice filled the room. The thief felt scared and jumped onto the window. Then he jumped down two floors to the ground. He gave a shout.
His grandmother was awake and she called the police right away. The thief couldn’t get up, because his leg was badly hurt. When the policemen came, they were very happy. “Great, Sam,” said a policeman. “This man is a famous thief.”
根据短文内容，判断正(T)误(F)。The living room was next to Sam’s bedroom. It was near the kitchen.
Only Sam and his grandmother were sleeping in the house that night.
.Sam shouted, so the thief was scared and jumped out of the house.
The thief wasn’t hurt at all after he jumped out of the house.
The policemen were very happy because they caught the famous thief.