Facebook means never having to say goodbye． The social media website has earned a reputation for reconnecting old friends． Last week,  a guy whom I hadn't seen since my bachelor party five years ago sent me a friend request． I accepted and waited for "Easy E" to send me a greeting of some kind． He had sought me out,  after all．

 I learned from his profile that he was in a relationship and had a son． However,  I'm pretty sure we won't ever write wall-to-wall, let alone e-mail each other． But he'll remain a friend of' online until one of us makes a point of' removing the other from his official list．

My pool of friends consists of family members, college buddies, co-workers from past and present,  and friends of' friends． There are 35 in all． If I spent some time uploading old e-mail addresses, I'm confident that I could increase my friend count actually．

A person could make a mission out of' reconnecting with childhood friends, former classmates,  distant cousins, and those one would like to get to know better． And some people can  even handle hundreds of no-screen relationships, keeping up with the daily happenings of'  their small army of' companions． After all, there are worse fates than having too many friends．

Thanks to e-mail, the inability to schedule face-to-face meetings no longer means a friendship must come to a close． But even with e-mail,  people will lose touch if' one or both parties stop writing back． That's normal． People move from school to school,  job to job, city to city．You never have to feel guilty for breaking away．

Every day,the masterminds of' Web 2．0 find new ways of' making human communication easier． However, convenience can be a crutch （拐杖）． Some things shouldn't be simplified．When it comes to friendship,  there can be no shortcuts．

46．According to Paragraph l,  the website is famous because           ．

    A．it has an interesting name of'“ Facebook”

    B．it helps people get in touch with old friends

    C．it can send people a greeting of' some kind

    D．it reminds people of 'events in the past

47．From the second paragraph we can learn that the writer          ．

  A．would write to the friend quite often

  B．a(chǎn)sked the friend to e-mail him

    C．did get some information about the friend

    D．would keep in touch with the friend forever

48．Which of 'the following statements is NOT true?

    A．There are 35 people in the author's list of' friends right now．

    B．The author communicates with all the 35 friends by e-mails．

    C．The list of'35 friends doesn't include the old e-mail addresses．

    D．It is not difficult for the author to increase his friend count．

49．What does the write mean by saying “However, convenience can be a crutch（拐杖）”?

    A．The masterminds of Web 2．0 also sell crutch online．

    B．Taking a crutch is a new way of' making friends online．

   C．Convenience is dangerous for human communication．

    D．Convenience is not really good for human communication．

50．What does the author think of' the convenience of' communicating online'?

    A．The technology could not keep true friendship forever．

   B．The social website of Facebook means nothing at all．

   C．There will be no ways of making real friends online．

    D．People will not lose friends with the help of' the Facebook．

Facebook means never having to say goodbye. The social media website has earned a reputation for reconnecting old friends. Last week，a guy whom I hadn't seen since my bachelor party five years ago sent me a friend request. I accepted and waited for “Easy E” to send me a greeting of some kind. He had sought me out，after all.

I learned from his profile that he was in a relationship and had a son. However，I'm pretty sure we won't ever write wall-to-wall，let alone e­mail each other. But he'll remain a friend of online until one of us makes a point of removing the other from his official list.

My pool of friends consists of family members，college buddies，co­workers from past and  present，and friends of friends. There are 35 in all. If I spent some time uploading old e­mail addresses，I'm confident that I could increase my friend count actually.

A person could make a mission out of reconnecting with childhood friends，former  classmates，distant cousins, and those one would like to get to know better. And some people can even handle hundreds of on­screen relationships，keeping up with the daily happenings of  their small army of companions. After all，there are worse fates than having too many friends.

Thanks to e­mail，the inability to schedule face-to-face meetings no longer means a  friendship must come to a close. But even with e­mail，people will lose touch if one or both  parties stop writing back. That’s normal. People move from school to school，job to job，city to city. You never have to feel guilty for breaking away.

Every day，the masterminds of Web 2.0 find new ways of making human communication  easier. However，convenience can be a crutch(拐杖)．Some things shouldn't be simplified. When it comes to friendship，there can be no shortcuts.

1.According to Paragraph 1，the website is famous because ________.

2.From the second paragraph we can learn that the writer ________.

3.Which of the following statements is NOT true?

4.What does the author think of the convenience of communicating online?

A black hole is created when a large star burns out. Like our sun, stars are unbelievably hot furnaces(熔爐) that burn their own matter as fuel. When most of the fuel is used up, the star begins to die.

The death of a star is not a quiet event. First there is a huge explosion. As its outer layer is blasted off into space, the dying star shines as brightly as a billion suns.

After the explosion gravity pulls in what’s left of the star. As the outside of the star sinks toward the center, the star gets smaller and smaller. The material the star is made of becomes tightly packed together. A star is so dense that a teaspoon of matter from it weighs billion of pounds.

The more the star shrinks, the stronger the gravity inside it becomes. Soon the star is very tiny, and the gravity pulling it in is unbelievably strong. In fact, the gravity is so strong that it even pulls light into the star! Since all the light is pulled in, none can go out. The star becomes black when there is no light. Then a black hole is born!

That’s what we know about black holes. What we don’t know is this: What happens inside a black hole after the star has been squeezed into a tiny ball? Does it keep getting smaller and smaller forever? Such a possibility is hard to imagine.

But if the black hole doesn’t keep shrinking, what happens to it? Some scientists think black holes are like doorways to another world．They say that as the star disappears from our universe, it goes into another universe. In other words a black hole in our universe could turn into a “white hole” in a different universe. As the black hole swallows light, the white hole shines brightly — somewhere else. But where? A different place, perhaps, or a different time — many years in the past or future.

Could you travel through a black hole? Right now, no. Nothing we know of could go into a black hole without being crushed．So far the time being, black hole must remain a mystery.

Black holes are a mystery—but that hasn’t stopped scientists from dreaming about them. One scientist suggested that in the future we might make use of the power of black holes. They would supply all of Earth’s energy needs, with plenty to spare. Another scientist wondered if a black hole could some day be used to swallow earthly waste—a sort of huge waste disposal (處理) in the sky!

When the star begins to die ______.

       A．there is no fuel left in it B．its outer layer goes into space first

       C．a(chǎn) huge explosion will happen        D．it doesn’t give off light any longer

Which of the following doesn’t help produce a black hole?

       A．The gravity inside the star is very strong.

       B．The light can’t go out of the star.

       C．The star becomes smaller and smaller

       D．The dying star shines very brightly.

The black hole ______.

       A．continues becoming smaller and smaller all the time

       B．goes into another universe and becomes a white hole

       C．can pull in everything we know of in the world

       D．will appear at another place at a different time

What’s the best title for this passage?

       A．A New Scientific Discovery: Black Holes

       B．How Do Black Holes Come Into Being?

       C．What Are Black Holes?

       D．Travel Through A Black Hole

Hearing his words，I couldn’t decide ______or remain.

A.whether to go abroad                                     B.if I go abroad

C.if to go abroad                                              D.to go abroad

Cities alarmed by deaths and injuries of pedestrians are taking efforts to make crosswalks safer for people on foot, especially seniors and children who need more time to cross streets.
A pedestrian is killed in a traffic accident in the USA every 110 minutes；one is injured every nine minutes, according to official date. Crosswalk can be especially dangerous for the elderly. Among people 70 and older, 36% of pedestrian deaths in 2006 occurred in crosswalks, compared with 21% of those younger than 70, according to the Insurance Institute for Highway Safety.
The Federal Highway Administration（FHWA）advises that next year states increase by nearly 15% the amount of time traffic lights provide for pedestrians to cross the street after the flashing orange hand appears .
FHWA spokesman Doug Hecox says reasons for the change include an aging population that needs more time to cross, health-conscious Americans walking more, children encouraged to walk to prevent getting overweight and high gas prices pushing people to walk instead of drive.
Pedestrian deaths went down by 12% from 5,449 in 1996 to 4,784 in 2006. But among those in 2006, 471 were killed in crosswalks, down slightly from 488 ten years earlier, the National Highway Traffic Safety Administration (NHTSA) says.

1. 1.

   Which of the following is true according to the text?

   1. A.
      Among 100 pedestrian deaths there were 21 people younger than 70.
   2. B.
      Old people are more likely to meet with accidents in crosswalks.
   3. C.
      Traffic accidents killed more old people than young people.
   4. D.
      About seven traffic accidents happened per hour.
2. 2.

   What is FHWA’s suggestion to states?

   1. A.
      Fixing more traffic lights.
   2. B.
      Providing more crosswalks.
   3. C.
      Giving pedestrians more time to cross streets.
   4. D.
      Increasing the time before the orange lights appear.
3. 3.

   What’s the cause of the crosswalk safety problem according to the test?

   1. A.
      There’re many cars and buses on the road.
   2. B.
      Pedestrians are careless.
   3. C.
      Crosswalks are crowded.
   4. D.
      Drivers don’t give way.
4. 4.

   The report from NHTSA suggests that             

   1. A.
      fewer people were injured in crosswalks
   2. B.
      crosswalk safety has been greatly improved
   3. C.
      much has been done to reduce traffic accidents
   4. D.
      pedestrian deaths in crosswalk remain a serious problem