Science teacher Mr. Miller agrees. “It is a 36 way for students to know the outside world,” he said.

Mr. Miller now regards himself as a guide of learning 37 as a teacher.“ If they have a question for me, I will try to teach them 38 to find the answers rather than tell them what the answers are,” he said.

Dale, another student, loves technology. He was not really interested in class before, 39 now he likes the classes very much. “It helps me use what I know about technology at school,” Dale said. “Most importantly, I 40 the classroom. This, of course, will help my studies.”

31.

A. dormitory B. playground C. library D. classroom

32.

A. allow B. use C. want D. help

33.

A. boring B. relaxing C. amazing D. disappointing

34.

A. on B. by C. at D. with

35.

A. open up B. look up C. put up D. call up

36.

A. wrong B. slow C. quick D. bad

37.

A. because of B. instead of C. according to D. thanks to

38.

A. why B. what C. when D. how

39.

A. but B. and C. or D. so

40.

A. stand B. hate C. enjoy D. dislike

四、阅读理解(共15小题;共30分)

A

Look closely at your hands. Are they clean? It doesn't matter how many times you wash your hands, tiny microbes(微生物) still stay on them. But don't worry. Most microbes don't harm you.

Now scientists say the microbes on our hands could be used in a surprising way; fighting crime, according to a recent survey microbes as well as fingerprints(指纹) could be used to identify the criminal.

Everyone has his own set of microbes on the hands. That is to say, if you and your best friend were able to see and compare all the microbes on your hands, your hands probably would look different. Some microbes only show up on your hands while others live only on your friend's hands.

When you work on a computer you leave the microbes from your hands on the keyboard. The scientists can easily tell the owner of the keyboard by looking at the microbes on it. Even if you don't leave your fingerprints behind, your microbes may give you away.

Noah Fierer, a scientist, says, "You can only clean a fingerprint, but you can't sterilize(使无菌) a surface just by wiping(擦) it off." He says that scientists have a lot more work to do before the microbe is used as a useful tool.

41. According to the passage, could be used to identify the criminal.

A. fingerprints

B. scientists' hands

C. microbes

D. fingerprints and microbes on people's hands

42. Paragraph 3 tells us that .

A. our hands look similar

B. the microbes will make the keyboard dirty

C. we should compare hands often

D. we have our own sets of microbes

43. When you work on computer, the microbes .

A. just stay on our hands B. also stay on the keyboard

C. will do harm to you D. will disappear

44. From Noah Fierer we know that

A. fingerprints are no longer useful in fighting crime.

B. microbes can be found on everyone's hands.

C. unlike microbe fingerprints can be cleaned if people wipe them.

D. the microbe is used as a useful tool.

45. What's the best title of the passage?

A. Microbes May Tell Who You Are

B. Scientists Say Everyone Has Microbes

C. Noah Fiercer Does Research Into Microbes

D. Fingerprints Help Catch Criminals

B

How did ancient people tell time?

◆ Natural ways of keeping time

In ancient time, people had to use the sun and the moon to tell time. They got up when the sun came up and worked in the fields until the sun went down.

◆ Man-made things

The sand clock is made of two glass balls joined by a narrow neck. The top ball was filled with sand. The sand slowly moved through the neck into the bottom(底部) ball. People knew the time by watching how much sand fell to the bottom ball. People also made the water clock. They made a small hole near the bottom of a pot. When the water in the pot dripped(滴) out, marking(刻度) inside the pot showed how much time passed.

◆ Body clocks in living things

Animals' body clock

Animals don't need clocks to know time. They have their body clocks. Birds know when to fly to warmer places before winter. Some animals know when to keep more food for the winter. Some fish know when it's time to move up the river and lay eggs.

Plants' own clock

Plants have their own clocks to keep time. Plants know when to open flowers or when to drop their leaves.

Body clock in human beings

People also have their own body clocks. When we get used to our lives, our body clocks can be very exact. It can tell us when it's time to wake up. It can also tell us when to eat or to go to sleep.

46. How could an ancient farmer know when to go back home from the field in the daytime?

A. By looking at the moon

B. By the sand clock or the water clock

C. By looking at the sun

D. By feeling whether tired or not

47. According to the passage, how can animals know time?

A. They use body clocks

B. They ask other animals

C. They use the sun and the moon

D. They make something to tell time