All my life I had loved airports．To me，they were fl kind of magic gateway to the world，but today it seemed like a cold and heartless place．

“Well，here we are，the airport，"my sister said with fl sigh．As 1 watched her unload my luggage，I could see the sadness in her eyes．One last hug and a final good-bye and I would be on my way to a new lire abroad，leaving my beloved sister behind．

I looked at my sister and even though her eyes were filled with tears，she was trying to keep a brave face．“You’d better go or you’ll miss your flight，”she said．

“I am just going to walk away and not look back，” I said． As I held her one last time she whispered，“Don’t worry about me，I’ll be fine．"“I’ll miss you，” I replied with tears in my eyes．As I promised，I did not look back。but 1 was sobbing．To me it was the end of the world．

While boarding the plane 1 was still crying．I did not have the energy to put my bag in the overhead locker, so I put it on the empty seat next to mine．As I settled into my chair， a feeling of sadness overwhelmed（淹没） me．I felt like my best friend had just been taken away from me．

The plane shook heavily and the bag fell，with some stuff spreading on the floor．When I bent over to gather the things up，I saw an unfamiliar little book in the middle of my belongings．It was not until I picked it up that I realized that it was a diary．

Immediately I recognized my sister’s handwriting． “Hi，Sis，What a day it has been today．First you let me know that you are moving abroad and then my boss…”My sister had been keeping a diary for the past month and she was now passing it on to me．I was to write in it for the next couple of months and then send it back to her．Even though a large ocean separated us，at some point it felt like she was actually there．

1.The writer started to cry          .

A．when she watched her sister unload her luggage

B．when she held her sister one last time

C．when she settled hherself into her chair

D．when she was boarding the plane

2.what had the writer thought about airports before she separated from her sister?

A．Airports brought freedom．

B．Airports were on the top of her love．

C．Airports led to the wonderful world．

D．Airports were fl cold and heartless place．

3.From the writer’s and her sister’s tears，we can see         .

A．they loved each other very much

B．they felt sad about the new life

C．they were afraid of the separation

D．it was the end of the world to them

4.What do we know about the diary from the passage?

A．The writer’s sister gave it as a gift

B．The writer had put it in her own bag

C．The writer’s sister received it as a present

D．The two sisters would write in it and share it

All my life I had loved airports．To me，they were fl kind of magic gateway to the world，but today it seemed like a cold and heartless place．

“Well，here we are，the airport，"my sister said with fl sigh．As 1 watched her unload my luggage，I could see the sadness in her eyes．One last hug and a final good-bye and I would be on my way to a new lire abroad，leaving my beloved sister behind．

I looked at my sister and even though her eyes were filled with tears，she was trying to keep a brave face．“You’d better go or you’ll miss your flight，”she said．

“I am just going to walk away and not look back，” I said． As I held her one last time she whispered，“Don’t worry about me，I’ll be fine．"“I’ll miss you，” I replied with tears in my eyes．As I promised，I did not look back。but 1 was sobbing．To me it was the end of the world．

While boarding the plane 1 was still crying．I did not have the energy to put my bag in the overhead locker, so I put it on the empty seat next to mine．As I settled into my chair， a feeling of sadness overwhelmed（淹没） me．I felt like my best friend had just been taken away from me．

The plane shook heavily and the bag fell，with some stuff spreading on the floor．When I bent over to gather the things up，I saw an unfamiliar little book in the middle of my belongings．It was not until I picked it up that I realized that it was a diary．

Immediately I recognized my sister’s handwriting． “Hi，Sis，What a day it has been today．First you let me know that you are moving abroad and then my boss…”My sister had been keeping a diary for the past month and she was now passing it on to me．I was to write in it for the next couple of months and then send it back to her．Even though a large ocean separated us，at some point it felt like she was actually there．

43．The writer started to cry          .

       A．when she watched her sister unload her luggage

       B．when she held her sister one last time

       C．when she settled herself into her chair

       D．when she was boarding the plane

44．what had the writer thought about airports before she separated from her sister?

       A．Airports brought freedom．

       B．Airports were on the top of her love．

       C．Airports led to the wonderful world．

       D．Airports were fl cold and heartless place．

45．From the writer’s and her sister’s tears，we can see         .

       A．they loved each other very much

       B．they felt sad about the new life

       C．they were afraid of the separation

       D．it was the end of the world to them

46．What do we know about the diary from the passage?

       A．The writer’s sister gave it as a gift．

       B．The writer had put it in her own bag．

       C．The writer’s sister received it as a present．

       D．The two sisters would write in it and share it．

All my life I had loved airports．To me，they were fl kind of magic gateway to the world，but today it seemed like a cold and heartless place．
“Well，here we are，the airport，"my sister said with fl sigh．As 1 watched her unload my luggage，I could see the sadness in her eyes．One last hug and a final good-bye and I would be on my way to a new lire abroad，leaving my beloved sister behind．
I looked at my sister and even though her eyes were filled with tears，she was trying to keep a brave face．“You’d better go or you’ll miss your flight，”she said．
“I am just going to walk away and not look back，” I said． As I held her one last time she whispered，“Don’t worry about me，I’ll be fine．"“I’ll miss you，” I replied with tears in my eyes．As I promised，I did not look back。but 1 was sobbing．To me it was the end of the world．
While boarding the plane 1 was still crying．I did not have the energy to put my bag in the overhead locker, so I put it on the empty seat next to mine．As I settled into my chair， a feeling of sadness overwhelmed（淹没） me．I felt like my best friend had just been taken away from me．
The plane shook heavily and the bag fell，with some stuff spreading on the floor．When I bent over to gather the things up，I saw an unfamiliar little book in the middle of my belongings．It was not until I picked it up that I realized that it was a diary．
Immediately I recognized my sister’s handwriting． “Hi，Sis，What a day it has been today．First you let me know that you are moving abroad and then my boss…”My sister had been keeping a diary for the past month and she was now passing it on to me．I was to write in it for the next couple of months and then send it back to her．Even though a large ocean separated us，at some point it felt like she was actually there．

1. 1.

   The writer started to cry         

   1. A.
      when she watched her sister unload her luggage
   2. B.
      when she held her sister one last time
   3. C.
      when she settled herself into her chair
   4. D.
      when she was boarding the plane
2. 2.

   what had the writer thought about airports before she separated from her sister?

   1. A.
      Airports brought freedom．
   2. B.
      Airports were on the top of her love．
   3. C.
      Airports led to the wonderful world．
   4. D.
      Airports were fl cold and heartless place．
3. 3.

   From the writer’s and her sister’s tears，we can see        

   1. A.
      they loved each other very much
   2. B.
      they felt sad about the new life
   3. C.
      they were afraid of the separation
   4. D.
      it was the end of the world to them

Since people first sent rockets into space in the 1950s, we have been leaving behind all sorts of things. Some of them, like the camera, were lost by astronauts while they did work outside their spaceship. But much of the space junk is made up of little pieces of things that were once bigger objects, until they struck each other and broke apart.

Some things we send into space fall back toward the earth and burn up in the atmosphere. But larger pieces sometimes survive the extreme heat and hit the ground or the ocean at great speeds. So there is always concern that something may fall from the sky and do some harm.

But space junk falling on housetops (屋顶) is not the biggest worry. Scientists are concerned about what happens when an empty rocket strikes another while orbiting (绕轨道飞行) the earth. Two big things become many smaller things. They then hit other things. The pieces get smaller and smaller until they form a cloud of junk that blocks the path of future space vehicles.

So what can be done to clean up the space around our planet? Marco Castronuovo, an Italian researcher, talks about sending a satellite into space that would get very close to some of the larger pieces of space junk. The satellite would connect a small rocket to the useless object. When the rocket explodes, it pushes the junk into a lower and slower orbit, nearer the earth. After a time, the junk burns up in the atmosphere.

Mr. Castronuovo has proposed (提议) using a number of small satellites with robotic arms. One arm would catch the space junk, and another arm would connect the rocket. He imagines that each satellite would jump from one large piece of junk to another. He thinks this method could destroy about ten large objects each year.

Scientists have been concerned about space junk for many years. Right now, the costs of the clean-up have been too great. Mr. Castronuovo says his system could be put in place for a much more reasonable amount of money.

1.Much of the space junk _____.

A．was thrown by the astronauts

B．is from broken spaceship

C．is made up of small pieces of things

D．returns to the earth piece by piece

2.Scientists are most worried that the space junk _____.

A．will stop the future space vehicles

B．will do harm to the atmosphere

C．will fall on the housetops

D．will burn up in space

3.What does Marco Castronuovo think of his system?

A．It can remove space junk completely.

B．It can save a large amount of money.

C．It can create a large amount of space.

D．It can develop robotic technology.

Multitasking

People who multitask all the time may be the worst at doing two things at once, a new research suggests. The findings, based on performances and self-evaluation by about 275 college students, indicate that many people multitask not out of a desire to increase productivity, but because they are easily distracted (分心) and can’t focus on one activity. And “those people turn out to be the worst at handling different things,” said David Sanbonmatsu, a psychologist at the University of Utah.

Sanbonmatsu and his colleagues gave the students a set of tests and asked them to report how often they multitasked, how good they thought they were at it, and how sensation-seeking (寻求刺激) or imperative (冲动) they were. They then evaluated the participants’ multitasking ability with a tricky mental task that required the students to do simple mathematical calculations while remembering a set of letters.

Not surprisingly, the scientists said, most people thought they were better than average at multitasking, and those who thought they were better at it were more likely to report using a cellphone while driving or viewing multiple kinds of media at once. But those who frequently deal with many things at the same time were found to perform the worst at the actual multitasking test. They also were more likely to admit to sensation-seeking and impulsive behavior, which connects with how easily people get bored and distracted.

“People multitask not because it’s going to lead to greater productivity, but because they’re distractible, and they get sucked into things that are not as important.” Sanbonmatsu said.

Adam Gazzaley, a researcher at the University of California, San Francisco, who was not a member of the research group, said one limitation of the study was that it couldn’t find out whether people who start out less focused   toward multitasking or whether people’s recognizing and understanding abilities change as a result of multitasking.

The findings do suggest, however, why the sensation-seeker who multitask the most may enjoy risky distracted driving. “People who are multitasking are generally less sensitive to risky situations.” said Paul Atchley, another researcher not in the group. “This may partly explain why people go in for these situations even though they’re dangerous.”

1. The research led by Sanbonmatsu indicates that people who multitask       .

A．seek high productivity constantly

B．prefer handling different things when getting bored

C．are more focused when doing many things at a time

D．have the poorest results in doing various things at the same time

2.When Sanbonmatsu and his colleagues conducted their research, they          .

A．assessed the multitasking ability of the students

B．evaluated the academic achievements of the students

C．analyzed the effects of the participants’ tricky mental tasks

D．measured the changes of the students’ understanding ability

3.According to Sanbonmatsu, people multitask because of their        _.

A．limited power in calculation               B．interests in doing things differently

C．inability to concentrate on one task          D．impulsive desire to try new things

4. From the last paragraph, we can learn that multitaskers usually____  .

A．drive very skillfully

B．go in for different tasks

C．fail to react quickly to potential dangers

D．refuse to explain the reasons for their behavior