Martin is an American boy. He is eight years old. His parents   41  _ five years ago and he is now living with his grandmother in New York.
　　One morning,  Jimmy ,  one of his classmates, came to his home with an exercises book in his hand. Jimmy lives in a house not far from Martin's. They often go to school together.
　　"Would you help me with this maths problem?" Jimmy said as soon as he came into the room. "It's too hard for me and I can't work it out."
　　"Let me try, " Martin said. "I   42  it isn't too hard for me. "
　　Martin tried his best but he couldn't work it out,   43   .
　　"If we had a small computer,  all the problems would be  44   for us to do. " Jimmy said.
　　"A small computer . . . , " Martin thought for a minute,  then he said, "I've got an idea. We can   45  one in a shop. "
　　"A computer is very   46   ,  and we don’t have enough money. "
　　"That's OK, " said Martin. "We can ask the new president (总统)   47  some money. He said he would help anyone in trouble. I' m sure he will help us. He is very rich, you know."
　　So they decided to write a letter to the new president. Soon the letter was finished and they hurried to the post office.
　　In front of the post office stood a small box. They   48   the letter into the box carefully and went home happily.
The next morning, they    49   the post office on their way to school. They found   50  ,  the box was not a post box but trash-box (果皮箱).

Have you ever rubbed your hands together when they get cold? Why do we do that? We do that for friction. Friction happens when two things that aren’t very smooth rub together to make heat energy. The faster you rub two things together, the more friction ( and heat) you can make. Let’s discover friction!

WHAT YOU’LL NEED

·Soap ·Water·Your hands!

WHAT TO DO

Make sure your hands are dirty.

Rub your hands together until you feel the heat of your hands.

Now, use soap and water to get your hands very slippery(滑的).

Try to make friction happen while your hands are slippery.

Please write down what has happened.

LET’S TALK!

Friction is an energy that happens when two things rub together. When friction happens, it makes heat! When your hands are slippery, they won’t make very much friction and your hands won’t get so hot.

DID YOU KNOW?

Friction happens when you stop your fast running bike.

Ancient people made fire by rubbing two pieces of wood together. Friction happened though they didn’t know it.

____?___

Friction is everywhere. Have you ever noticed situations where friction is happening? If not, ask your parents to take you out in a car. If it is not hot, touch the tires(轮胎) of the car before and after a short drive to see how much warmer they get from friction.

1. This text is most probably________________________.

A. a science report????????????? ????????????? ????????????? 　 B. a car advertisement

C. a rubbing introduction?????? D. a chemistry programme

2.What does the word “friction” in this text mean in Chinese????????

A.摩擦????????????? ????????????? B. 冷却??????? C. 膨胀????????????? ????????????? ????? D.震动

3.___________ is not an example of friction.

A. Bike riding????????????? B. Car driving??? C. Hands rubbing????????????? ? D.Friction discovering

4.What’s the last column(栏目)?

A. THINK IT OVER!????????????? ????????????? ????????????? ????????????? ?? B. WHAT HAPPENED?

C.EVERYDAY ACTION:????????????? D. WORK WITH PARENTS

Martin is an American boy. He is eight years old. His parents   41  _ five years ago and he is now living with his grandmother in New York.
　　One morning,  Jimmy ,  one of his classmates, came to his home with an exercises book in his hand. Jimmy lives in a house not far from Martin's. They often go to school together.
　　"Would you help me with this maths problem?" Jimmy said as soon as he came into the room. "It's too hard for me and I can't work it out."
　　"Let me try, " Martin said. "I   42  it isn't too hard for me. "
　　Martin tried his best but he couldn't work it out,   43   .
　　"If we had a small computer,  all the problems would be  44   for us to do. " Jimmy said.
　　"A small computer . . . , " Martin thought for a minute,  then he said, "I've got an idea. We can   45  one in a shop. "
　　"A computer is very   46   ,  and we don’t have enough money. "
　　"That's OK, " said Martin. "We can ask the new president (总统)   47  some money. He said he would help anyone in trouble. I' m sure he will help us. He is very rich, you know."
　　So they decided to write a letter to the new president. Soon the letter was finished and they hurried to the post office.
　　In front of the post office stood a small box. They   48   the letter into the box carefully and went home happily.
The next morning, they    49   the post office on their way to school. They found   50  ,  the box was not a post box but trash-box (果皮箱).

阅读下列短文，完成任务A和B。

Introduction  to  invitations（邀请活动简介）

Invitations are important. In the west, people often give invitations to their friends. Most invitations are for dinner or a birthday party.

   When people accept（接受）an invitation to a dinner or party, they usually ask what they can bring. They often take flowers, chocolates, or other presents. People usually take a birthday present to a birthday party.

After a dinner or birthday party , most people telephone the host（主人）to say “thank you”. Some people write a short thank-you note or send an e-mail to the host.

任务A：Mary想邀请James参加生日晚会，请将以下各项活动按正确的顺序排列，把序号填入相应的横线上。

A. Mary and James enjoy the party together.      

B. James accepts the invitation.

C. James writes a thank-you note.              

D. James brings a birthday present.

E. Mary invites her friend James to her birthday party.

.  　E　    1.____      2. ____    3.____  4 .____

任务B：请你帮James 给Mary 写一句表示感谢的话。

5.                                   .