12、The two experts worked at the task of writing a preface to the new dictionary for three hours             .

       A．at length              B．in full                  C．on end                D．in time

11、

10、Both countries are for cultural exchanges, which should         mutual understanding.

       A．make up              B．make out             C．make off             D．make for

9、Leaving your car unlocked outside is just          trouble.

       A．attracting             B．drawing               C．resulting              D．inviting

8、Nowadays, few people form the habit of keeping a supply of candles in the house in case of power            .

       A．drop                   B．failure                 C．lack                    D．absence

7、Towards       evening,      icy rain began to fall and       road became slippery.

       A．/;the; a                B．/; an ; the             C．the; /; a               D．the; / the

6、下图中三个人都自称是“爱鸟人”，但其方式却不相同。请描述他们的不同做法并就爱护动物保护环境发表自己的观点。注意；词数：100字左右。

4、For more than twenty years scientists have been searching for signs of life on other planets．Most of these searches have been done over the radio．The hope is that someone in outer space may be trying to get in touch with us．Scientists also have sent radio and television messages，as well as messages on spaceships travelling through space，on the chance that someone maybe receptive to such messages．Scientists are using powerful radio telescopes to listen to signals from about 1000 stars，all within 100 light years of Earth．In addition，they will scan（扫视） the entire sky to“listen”for radio messages from more distant stars．Using a computer， they will be able to monitor more than eight million channels at one time．Scientists are looking for any signal that stands out from the background noise．

Of the 200 billion stars in the Milky Way galaxy，scientists find that five percent are like our sun．Perhaps half of them have a planet like Earth．Such a planet would be a reasonable distance from the star for temperatures to be right for the evolution（进化） of life．Based on the inhabitable（that can be lived in）planets in our galaxy，most scientists agree that chances are likely that one or more of these planets supports some life．However，many scientists wonder whether intelligent（有智力的）life exists on other planets．Some believe that twenty years of searching without any intelligible messages shows that no one is out there． They say that the evolution of intelligence comparable to ours is unlikely．

Other scientists believe that our search hasn't been long enough to rule out the possibility that intelligent life exists in our galaxy．Although our sun family is only about five billion years old，our galaxy is about 20 billion years old．In that time some scientists think it is likely that civilizations（文明）much more advanced than ours have developed．Perhaps these civilizations send us no signals；perhaps we have not recognized the signals they have sent us．If we hope to find intelligent life，the scientists believe that we have to keep looking．

68．According to the passage，how many planets in our galaxy might be inhabitable？

       A．5 billion．           B．10 billion．      C．15 billion．   D．20 billion．

69．The first paragraph in this passage is mainly about ____ ．

       A．how scientists are looking for signs of life on other planets

       B．why scientists are looking for signs of life on other planets

       C．where scientists are looking for signs of life on other planets

       D．when scientists began to look for signs of life on other planets

70．The underlined word“monitor”in the passage means“____”．

       A．find                    B．follow                C．check                 D．form

71．Which of these statements is true based on the information in the passage？

A．The earth is one of the oldest planets in our galaxy．

       B．Most scientists believe that there is intelligent life on other planets．

       C．Scientists are trying different ways to find signs of life on other planets．

       D．Scientists don't believe that intelligent life exists on other planets．

3、Reducing the amount of sleep students get at night has a direct impact on their performance at school during the day. According to classroom teachers, elementary and middle school students who stay up late exhibit more learning and attention problems. This has been shown by Brown Medical School and Bradley Hospital research. In the study, teachers were not told the amount of sleep students received when completing weekly performance reports, yet they rated the students who had received eight hours or less as having the most trouble recalling all the material, learning new lessons and completing high quality work. Teachers also reported that these students had more difficulty paying attention. The experiment is the first to ask teachers to report on the effects of sleep deficiency in children. Just staying up late can cause increased academic difficulty and attention problems for otherwise healthy, well functioning kids, said Garharn Forlone, the study’s lead author. So the results provide professionals and parents with a clear message: when a child is having learning and attention problems, the issue of sleep has to be taken into consideration. “If we don’t ask about sleep, and try to improve sleep patterns in kids’ struggling academically, then we aren’t doing our job”, Forlone said. For parents, he said, the message is simple, “getting kids to bed on time is as important as getting them to school on time.”

65．What were teachers told to do in the experiment?

       A．Monitor students’ sleep patterns.

       B．Help students concentrate in class.

       C．Record students’ weekly performance.

       D．Ask students to complete a sleep report

66．According to the experiment, what problem can insufficient sleep cause in students?

       A．Declining health.                                  B．Lack of attention.

       C．Loss of motivation.                              D．Improper behavior.

67．What message did the researcher intend to convey to parents?

       A．They should make sure their children are always punctual for school.

       B．They should ensure their children grow up in a healthy environment.

       C．They should help their children accomplish high quality work.

       D．They should see to it that their children have adequate sleep.