题目内容
Scientists would like to place a huge mirror in space above the earth. It might be sixty miles wide. It would be used to catch the rays of the sun. It would direct the sun’s rays upon the earth as a child might do to make sunlight dance on the wall with a hand mirror.
Why do they want to do this? The sun’s rays could be helpful in many ways. They could light up cities by night. The warm rays could stop frosts which might come at night and hurt fruit crops. They could melt dangerous icebergs in the ocean. Perhaps they could hang cloud movements and bring rain where it is needed.
1. The huge mirror would _________.
A.stand 60 miles in height. B.be 60 miles from side to side
C.cover 60 miles above the earth D.be 60 miles above the earth.
2. The strong light from the mirror could possibly _________.
A.hurt fruit crops B.set fire to cities
C.bring longer daytime D.shine brighter than the moon
3. The huge mirror is __________.
A.something in a story B.is being made
C.just an idea D.to be made soon.
BCC
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