C. are supposed to receive radio waves coming from intelligent forms of life in other solar system
D. Both A and B
39. It can be inferred that natural radio signals are sent by _______.
A. NASA B. people on the earth
C. intelligent life in other solar system D. heavenly bodies
40. Which of the following statements may the author be in favor of?
A. NASA is wasting money and time
B. Maybe we are not alone in the universe
C. No life exists on any other planet beside the Earth
D. Signals sent by E.T. life might introduce confusion to the scientists on the Earth
IV. 短文改错：（1×10=10分）
Nov. 18, 2003
Dear editor,
There is a river in the front of my house. When I was a primary 41. ______________
school student, it was used to be a clean and clear river. There were all 42. ______________
kinds of fish in it. We often saw beautiful birds fly just over the water 43. ______________
surface. We used to fish by the river on spring Sundays but swim in it 44. ______________
in summer holidays. What happy it was during my childhood! 45. ______________
But later, a chemical plant was built near the river. From then , a 46. _______________
lot of dirty water has put into the river. It has been polluted seriously. 47. ______________
The green water has turned darkness. No fish can live in the dirty water. 48. ______________
No birds wanted to come to the river. We don’t want to swim in the dark 49. ______________
and 《新教材高一英语UNIT7教案(第7页)》出自：www.89xue.com网
www.89xue.com dirty river in summer. How terribly the pollution is! 50. ______________
We hope that some measures should be taken to stop the pollution.
Yours,
Wang Ping
用所给动词的正确形式填空：（1.5 × 10 = 15分）
51. ----Can you tell me how long Tom and Mary ________________________(marry)?
----For about three years.
52. Mr. John and I ____________(be) friends for ten years. We first got to know each other at a Christmas party. But we ____________(see) each other a couple of times before that.
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