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earth and where it would be in the sky at different times of the year. At that time, everything about the moon
was learned by watching it carefully in the sky.
When scientists could use telescopes to study the moon more closely, their ideas began to change. They
could see the moon was made of rocks. Most scientists thought moon rocks would be different from those on
Earth. This was because they believed the moon had once been a planet that had been caught in the earth's
gravity (引力) millions of years earlier.
In 1969 moon rocks were finally brought to the earth and studied. Much to their surprise, scientists
found that, except for water, the moon and the earth were made of the same things. Once again new ideas
were needed for this new information.
After years of study, most scientists now think that the moon was once part of Earth. They believe very
early in its history, maybe 4 million years ago, something about the size of Mars hit Earth. This sent billions of
rocks into space around our planet. These rocks slowly joined together and after many years became the moon.
In the future, even though our ideas about the moon may change again, we will still be interested in it.
B. Moon was once a part of Earth.
C. Moon moves around Earth and it's the only satellite of Earth.
D. Moon was once a planet caught in Earth's gravity.
B. scientists made out a modern spaceship
C. scientists invented an advanced telescope
D. humans left their footprints on Moon
B. How ideas about the moon have changed over time.
C. Where the moon came from in the past.
D. That people have finally learned the truth about the moon.
B. older than the earth
C. a planet caught by the earth's gravity
D. made of the same things as the earth
B. the earth was once part of the moon
C. new information brings new ideas
D. we now know everything about the moon
B. is everywhere
C. can be seen everywhere
D. pushes on everything
B. you don't know how to do it
C. you are not strong
D. gravity is out of the stone
B. the earth's gravity on you is less than 50 kilograms
C. you can lift up more than 50 kilograms of things
D. the earth's gravity on you is 50 kilograms
B. 24
C. 40
D. 60
请根据句意从方框中选择合适的动词，并用其适当时态填空，使句子通顺。
| weigh break have draw join clap |
1．We've just come back from Hainan．We _________ a fantastic time there．
2．Everything _________ more on the earth than on the moon because of gravity．
3．--Where were you this time yesterday?
--I _________ a picture in the park．
4．The children _________ their hands excitedly as soon as the astronauts appeared on the stage．
5．Good news! Our class _________ two school records so far!
6．-- _________ Jim _________ in the next basketball match?
--Of course he is．We can't win without him．
查看习题详情和答案>>We have always been interested in the moon．2000 years ago people a1ready knew it moved around the earth and where it would be in the sky at different times of the year．At that time，everything about the moon was learned by watching it carefully in the sky．
When scientists could use telescopes(望远镜)to study the moon more closely，their ideas began to change．They could see the moon was made of rocks．Most scientists thought moon rocks would be different from those on Earth．This was because they believed the moon had once been a planet(行星)that had been caught in the earth’s gravity(引力)millions of years earlier
In 1969 moon rocks were finally brought to the earth and studied．Much to their surprise，scientists found that，except for water，the moon and the earth were made of the same thing．Once again new ideas were needed for this new information．
After years of study，most scientists now think that the moon was once part of Earth．They believe very early in its history，maybe 4 million years ago，something about the size of Mars(火星)hit Earth．This sent billions of rocks into space around our planet．These rocks slowly joined together and after many years became the moon．
In the future，even though our ideas about the moon may change again，we will still be interested in it．
1．Now，we’re sure
A．Moon rocks are quite different from those on Earth．
B．Moon was once a part of Earth．
C．Moon moves around Earth and it's the only satellite of Earth．
D．Moon was once a planet caught in Earth’s gravity．
2．In 1969 there is a big event，that is ．
A．humans found no water in Moon rocks
B．scientists made out a modern spaceship
C．scientists invented an advanced telescope
D，humans left their footprints on Moon
3．What does the writer want to tell us in the passage?
A．Why people are interested in the moon．
B．How ideas about the moon have changed over time．
C．Where the moon came from in the past．
D．That people have finally learned the truth about the moon．
4．Before l 969 most scientists thought the moon was ．
A．part of the earth billions of years earlier
B．older than the earth
C．a planet caught by the earth’s gravity
D．made of the same things as the earth
5．From this passage we can learn that ．
A．scientists in the past were not clever
B．the earth was once part of the moon
C．new information brings new ideas
D．we now know everything about the moon
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