題目列表(包括答案和解析)
A.can hardly keep the value of your savings |
B.will cost much of your savings |
C.may increase your wealth |
D.needs your bravery |
A.suggest human beings are controlled by a clock |
B.describe why clocks can rule the planet Earth |
C.tell readers what clocks look like |
D.compare chocks to human beings |
A.Counting the beating of one's own heart. |
B.Making use of candles, sand and water. |
C.Observing shadows cast by the sun. |
D.Keeping slaves busy day and night. |
A.state-owned houses |
B.houses in very good condition |
C.grand houses open to the public |
D.houses where statesmen meet regularly |
A.to introduce the culture of antique clocks |
B.to offer some advice on collecting antique clocks |
C.to compare different ways to make a future profit |
D.to explain convenient and reliable ways of telling time |
A.It is an unfriendly place. |
B.It is a lively place. |
C.It is a nice place. |
D.It is a place with many plants. |
A.is usually the same |
B.is always very low |
C.can be very different |
D.is usually very high |
A.there is no life there |
B.there is no air there |
C.there is no green tree there |
D.there is no water there |
A.登上 | B.走出 | C.上來 | D.步入 |
A.water | B.trees | C.mountains | D.clouds |
|
Maybe you know a lot about the city you live in. You may even know some interesting facts about Earth, but 16 do you know about Mars? Will there be 17 there just like people on Earth?
Mars is the fourth planet from the sun and it's the most like Earth, but it's much 18 than Earth because it's farther from the sun. It's also the only planet whose surface can be 19 from Earth.
Mars is often called "the red planet" because the rocks on it have a dark 20 color. There are strong winds on Mars that can 21 dust into the hills.
For many years, people have 22 Mars. They have sent instruments and robots there. Some of the robots got there, 23 most failed.
NASA(美國國家宇航局) sent two robots to Mars two years ago. They wanted to 24 signs of water and life on Mars. Some day, humans will travel to Mars and have an even 25 look at our red neighbor. Maybe it could be you!
( )16. A. when B. what C. which D. how
( )17. A. sound B. life C. air D. water
( )18. A. hotter B. colder C. bigger D. smaller
( )19. A. seen B. wrote C. heard D. visited
( )20. A. red B. black C. white D. yellow
( )21. A. blow B. look C. mix D. fly
( )22. A. lived on B. landed on C. studied D. written
( )23. A. but B. and C. however D. or
( )24. A. leave B. use C. find D. give
( )25. A. faster B. farther C. closer D. lower
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