21. Why did people in the 19th century believe the existence of intelligent life on mars ?
A. Because the surface of Mars seemed to be geometric.
B. Because the lines were drawn across the surface of the planet.
C. Because a system of canals was thought to be there.
D. Because it was the Martians that built the canals.
22. The “canals” on Mars have proved to be according to the passage.
A. the minor geologic characteristics of Mars
B. natural valleys on the surface of Mars
C. rivers that have kept flowing since ancient times
D. a system that irrigates the whole surface
23.What are the Mars’ seasonal changes in color believed to be ?
A. The natural changes on the planet.
B. The seasonal cycles .
C. The movement of some life form .
D. The storm of dust in its atmosphere.
24. How is the 1996 discovery related to the possible existence of organisms on Mars?
A. The meteorite containing organic compounds is part of Mars.
B. A Martian rock struck Earth about 11,000 years ago.
C. The organisms came back to life after the collision with Earth.
D. The inhabiting organisms appeared more than three billion years ago.
25. How many arguments in this passage lead to the belief of the existence of life on Mars?
A. Tow B. Three C. Four D. Five
Questions 26-30are based on the following weather forecast:
Atlanta:
Mostly fair. 88-700F. Minneapolis:
Mostly cloudy. 68-500F.
Boston:
Partly cloudy. 78-610F. New Orleans:
Mostly fair. 92-730F.
Chicago:
Thunderstorms likely. 82-670F. Philadelphia:
Hazy and warm. 90-680F.
Cleveland:
Mostly cloudy. 84-680F. Phoenix:
Sunny and warm. 99-660F.
Dallas:
Thunderstorms likely.91-750F. Pittsburgh:
Partly cloudy. 81-640F.
Denver:
Rain likely.53-430F. St. Louis:
Thunderstorms likely. 86-700F.
Houston:
Partly cloudy. 90-780F. San Francisco:
Mostly fair. 73-600F.
Kansas City:
Thunderstorms likely. 73-600F. Seattle:
Mostly fair. 74-500F.
Las Vegas :
Sunny and warm. 93-560F. Toronto:
Rain likely. 83-680F.
Los Angeles:
Mostly sunny. 88-600F. Washington:
Partly cloudy. 88-720F.
Miami:
Partly cloudy. 88-790F.
26. According to the forecast,
A. Kansas City will be warmer than Toronto
B. Temperatures will be the lowest in Seattle and Minneapolis.
C. The weather will be fine in most of the listed cities.
D. More than half of the listed cities are cloudy or rain likely
27. Among the following four cities. The difference between the afternoon high and the evening low is smallest in
A. Kansas City
B. Miami
C. Atlanta
D. Seattle
28. Which of the following cities is closest to Miami in weather conditions?
A. Boston.
B. Atlanta.
C. Washington.
D. Houston.
29. The difference between the afternoon high and the evening low is greatest in .
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