Thousands of years ago，human(人类)didn’t live in towns．Sometimes they would live in caves(洞穴)or build camps in the forest．
Only about thirty people  1   in each camp．The men would go hunting while the woman and children  2 food from trees around the camp．All the food was  3 among people in the group．Every few weeks they moved to another place to find more food．It was a simple life，but people had to be  4．They had to make everything that they needed，and they had to know a lot about plants and animals．
Nowadays most people live in towns and cities，and they work in offices and factories．Life is 5 than in the old days．There are fewer  6 ，but there is less excitement．Some people go  7 excitement  sailing round the world．climbing mountains，or exploring(探测)caves．
Most people look forward to the  8 ,a time when they can enjoy a change from the normal life．For some this means going camping．But camping today is  9 from camping in the past．Gas cookers，ready-made food and air-beds mean people can camp much more  10 than they did in the old times．
1．A．lived         B．talked       C．came        D．danced
2．A．planted       B．collected     C．watched     D．bought
3．A．found        B．used         C．shared      D．sold
4．A．polite        B．kind         C．calm       D．clever
5．A．worse        B．faster        C．easier       D．harder
6．A．dangers       B．stories       C．people      D．animals
7．A．waiting for    B．looking for    C．turning on   D．putting on
8．A．dreams       B．gifts         C．meals       D．holidays
9．A．away        B．different       C．free        D．far
10．A．slowly       B．terribly        C．comfortably  D．hopefully

Thousands of years ago，human(人类)didn’t live in towns．Sometimes they would live in caves(洞穴)or build camps in the forest．

    Only about thirty people  1    in each camp．The men would go hunting while the woman and children  2  food from trees around the camp．All the food was  3  among people in the group．Every few weeks they moved to another place to find more food．It was a simple life，but people had to be  4．They had to make everything that they needed，and they had to know a lot about plants and animals．

    Nowadays most people live in towns and cities，and they work in offices and factories．Life is 5  than in the old days．There are fewer  6  ，but there is less excitement．Some people go  7  excitement  sailing round the world．climbing mountains，or exploring(探测)caves．

Most people look forward to the  8 ,a time when they can enjoy a change from the normal life．For some this means going camping．But camping today is  9  from camping in the past．Gas cookers，ready-made food and air-beds mean people can camp much more  10  than they did in the old times．

1．A．lived         B．talked       C．came        D．danced

2．A．planted       B．collected     C．watched     D．bought

3．A．found        B．used         C．shared      D．sold

4．A．polite        B．kind         C．calm        D．clever

5．A．worse        B．faster        C．easier       D．harder

6．A．dangers       B．stories       C．people      D．animals

7．A．waiting for    B．looking for    C．turning on   D．putting on

8．A．dreams       B．gifts         C．meals       D．holidays

9．A．away        B．different       C．free        D．far

10．A．slowly       B．terribly        C．comfortably  D．hopefully

Scientists study the world and learn about things using a process called the scientific method(方法). By asking important questions and   16  the answers, it is possible to make amazing discoveries! Sometimes a scientist is   17  to answer his own questions, but if he has taken good notes another scientist may come along later who is able to use new knowledge to answer it.

When you use the scientific method to   18  an experiment, you start by making observations(观察) about something that  19  you. Based on your observations, you make a hypothesis. This is using  20  you know to make a smart guess about what you think could happen. Then you are ready to begin your experiment. All   21  your experiment you take down notes, which are   22   experiment date(资料). You are constantly making observations during this time. You may make discoveries that cause you to improve your experiment as you go.   23  , you conclude your experiment and begin to look over your notes to decide what it all means. Based on what you have learned, you make a final statement about   24  your hypothesis was correct or not. You have to have reasons and evidence to support what you are saying.

Using the scientific method can be difficult, but rewarding. Because all the steps are organized in a process, the   25  are more valid(可信的). When you provide observations as evidence to support what you are saying, your ideas are more likely to be accepted.

1.                A．waiting for      B．searching for     C．worrying about D．complaining about

2.                A．unable         B．sure           C．ready    D．surprised

3.                A．read           B．refuse          C．prevent  D．conduct

4.                A．hurts          B．represents      C．interests  D．attacks

5.                A．what           B．when          C．why D．which

6.                A．without         B．including        C．except   D．during

7.                A．controlled      B．arranged        C．called    D．carried

8.                A．Obviously       B．Suddenly        C．Finally    D．Mostly

9.                A．whether        B．what           C．how D．when

10.               A．problem        B．results         C．services   D．aims

It’s Sunday. There are many  1  in the bus. And an old man is   2  here and there. He wants to find an empty  3  . Then he finds one. He goes to it. A small   4 is on the seat. And a young man is  5   it.

“Is this seat  6  ?” asks the old man.

“No, it’s for  7  . She goes to buy some bananas .” says the young man.

“Well.” Says the old man. “Let me sit here, please. When she comes back, I will leave here.”

The bus starts.

“ She doesn’t come,  8   her bag is here . Let me give her the bag.” The old man throws the bag  9    of the window.

The young man jumps up and shouts , “Don’t throw! It’s 10   bag.”