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____! We don’t have much time.  

A Come out   B Come along    C Come on    D Come over

It’s 10:00 pm. A man leaves a restaurant, gets into his car and drives away. 200 metres further he’s stopped by a police officer.

Officer: Good evening, sir. We’re testing drivers for drunk driving. Would you please blow（吹）into this machine?

Man:   I’m sorry, I can’t do that. If I blow into that machine, I will get out of air.

Officer: Please come along to the office and we can give you a blood test.

Man:   I can’t do that. If you give me a blood test, I will bleed（流血）to death.

Officer: Then you’ll have to get out and walk five metres along this white line.

Man:   I can’t do that, either.

Officer: Why not?

Man:   Because I’m dead drunk! I can’t open the door.

1.The man is stopped ______ metres away from the restaurant.

    A. 5                B. 10               C. 200              D. 205

2.The conversation probably happens in a (an) ______.

    A. office           B. street               C. hospital     D. restaurant

3.The man wouldn’t have the test for drunk driving because ______.

A. he is badly ill                      B. he will get out of air

C. he is dead drunk                     D. he will bleed to death

— We plan to go out for a picnic next weekend. Would you like to come along?

— ______. It’s my favourite.

　 A. Enjoy yourself　　　　　　　　　　 B. It doesn’t matter

　 C. You’re welcome　　　　　　　　 D. That would be very nice