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 on spaceships traveling through space, on the chance that someone may be receptive （善于接受的） to such messages.
Scientists are using powerful radio telescope to listen to signals from about 1,000 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 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 （银河星系）, 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 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 support 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 （可理解的） 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 in only about five billion years old, our galaxy is about 20 billions years old. In that time, some scientists think it is likely that civilizations are much more advanced than ours. Perhaps these civilizations （文明） send us no signals; perhaps we have not recognized the signals they have sent us. If we hope to find intelligent life, these scientists believe that we have to keep looking.
【小题1】According to the passage, how many planets in our galaxy might be inhabitable?

第二节：完形填空（共20小题：每小题1.5分，满分30分）
阅读下面短文，从短文后各题所给的四个选项（A, B, C, D) 中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
Hundreds of people, adults and children, come and go every day from the Kingsley School in Evanston, and police say that right now none of them has been eliminated(排除) as a(n)  21  suspect.  22 ,police have the weapon and detectives are trying to find out to whom it last  23 .
Investigators say that  24  Tuesday morning a few minutes before lunch a second grader found the weapon in a toilet in a first floor laboratory. It is a five-shot, 38 caliber(口径) revolver that was fully loaded.  25  the 7-year-old girl reported her discovery immediately.
“We’ve taken  26  . We’ve called the police. It’s being  27  . And we are concerned,” said Evanston School’s spokesperson Jan Roy.
Wednesday school officials sent students home with a  28  addressed to their parents about the  29  .
“At this point I don’t have enough answers and I would really like to get  30 ,” said Emily Gregrich, one of the parents.
31  parents who waited for their kids Thursday afternoon still had not  32  about the gun.
The principal conducted two assemblies(集会) to put to rest rumors  33  the 475 children who  34  the school. For  35 , the police investigation is focused on interviewing adults, teachers and nonprofessional staff members who were in the building the 24-hour period  36  the weapon was found.
“Where they were, what was going on, did they see anybody, you know, anybody in the school, anything unusual  37  , and we hope to  38  information through those interviews,” said Dep. Chief Joe Bellino of the Evanston Police Department.
Thursday afternoon the school district announced  39  to improve its efforts to communicate with  40  . It will make a phone tree Thursday night, and we are told the principal has invited parents who need more information about this to meet him here at the school Friday morning.
21．A．possible    B．unknown  C．strange     D．unusual
22．A．However  B．Later C．Meanwhile       D．Still
23．A．given       B．offered     C．devoted    D．belonged
24．A．after  B．before      C．early D．late
25．A．Suddenly  B．Fortunately      C．Quickly    D．Soon
26．A．advice      B．measures   C．notice       D．notes
27．A．investigated     B．discussed  C．questioned       D．removed
28．A．book B．speech      C．letter D．record
29．A．incident    B．accident    C．discovery  D．gun
30．A．angry       B．shocked    C．less   D．more
31．A．Some       B．Many       C．Any  D．Other
32．A．heard       B．read       C．talked    D．told
33．A．in   B．among   C．between        D．within
34．A．attend    B．love       C．escape    D．protect
35．A．all  B．certain   C．now       D．example
36．A．when     B．while     C．before   D．after
37．A．goes on  B．went on  C．were going on      D．going on
38．A．search    B．develop  C．prove     D．check
39．A．news      B．plans      C．instructions    D．introductions
40．A．parents   B．teachers   C．adults     D．Students

Cooler temperatures, attractive colors, smaller crowds autumn is the perfect time for travel and tourism. Here, three places are listed as the best fall trip destinations. Don’t worry if you can’t go to these places. By reading this page, we hope to take you on grand tour and let you experience fun and culture around the world.

1.The passage is presented for those who            .

A．care for fun and culture around the world

B．have planned to go for traveling this autumn

C．hate to have their holidays in other seasons

D．have not ever been to Europe and America

2.If you spend your holidays on October 31, you may           .

A．enjoy live music at the beer – drinking festival

B．watch polar bears hunt seals

C．taste traditional, paper – wrapped fish and clips

D．win a prize in “the Friendly Marathon”

3.According to the passage, we can know that          .

A．Car exhibitions will be held for two months.

B．It’s not necessary to take more clothes with you to Churehill, Martitoba

C．The beer – drinking event in German dates from the eighteenth century

D．Your favourite goods might be available in the expensive shop in Dublin

4.The passage is probably taken from the column of         in a newspaper.

A．economics  B．science        C．tourism        D．fashion

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 on outer space may be trying to get in touch with us. Scientists also have sent radio and television messages on spaceships travelling through space, on the chance that someone may be receptive to such messages.

Scientists are using powerful radio telescopes to listen to signals from about 1,000 stars, all within 100 light years of earth. In addition, they will scan the entire sky to “listen” for radio messages from more distant stars. Using a computer, they will be able to monitor more than eight 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(银河星系), scientist 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 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 life exists on other planets. Some believe that twenty years of searching without any intelligible message 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 about 20 billion years old. In that time, some scientists think it is likely that civilizations 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, these scientists believe that we have to keep looking.

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

A. 5 billion.　　　　　　 B. 10 billion.

C. 15 billion.　　　　　　 D. 200 billion.

2. 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 are looking for signs of life on other planets

3. The underlined word “monitor” in the second paragraph means “　　　　 ”.

A. find　 B. follow　 C. check　 D. form

4. 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 there might be life on other planets.

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 on spaceships traveling through space, on the chance that someone may be receptive to such messages.

Scientists are using powerful radio telescopes to listen to signals from about 1,000 stars, all within 100 light years of earth. In addition, they will scan the entire sky to “listen” for radio messages from more distant stars. Using a computer, they will be able to monitor more than eight 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 (银河星系), scientists find that 5% 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 support some life.

However, many scientists wonder whether intelligent (智能的) 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 civilization 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, these scientists believe that we have to keep looking.

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

A. 5 billion．　　 B. 10 billion.　　         C. 15 billion.　　         D. 200 billion

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 are looking for signs of life on other planets

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 don’t believe that there might be life on other planets.

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