题目内容
阅读理解
On the night of July 6, 1943, a plane took off from an Air Force base in England to intercept(中途拦截) German fighters over the English Channel. Piloting the plane was Captain Thomas Nash. Looking westward, Nash saw twelve orange lights in a row, moving at a fantastic rate of speed. An experienced flyer, he had never seen anything like that. Thinking they might be a new German weapon, he decided to chase(追赶) it. But when he swung the plane around and headed directly for the lights, they vanished(消失).
Captain Nash may have been the first to see such orange lights but he wasn't the last. His experience was repeated many times by pilots during World War Ⅱ, both in Europe and the Far East.
What were they? No one knows for sure, but there is an interesting theory to account for them. According to this theory, the orange lights are space animals－animals specially adapted to lie in the upper atmosphere just as some creatures are adapted to life at the bottom of the sea.
These space animals, the theory says, live so far up in the atmosphere that they are not visible from earth. They feed partly on the air and partly on energy from sunlight. Being almost pure energy themselves, they can regulate their bodies to glow at night. During the day they become invisible.
Prior to World War Ⅱ, the theory continues, there was little radiated energy available on the earth's surface. Then came the development of rockets, atomic reactors, and hydroelectric plants. The space creatures are attracted to these sources of energy or food. At night when there is no energy from sunlight, they come down into the lower levels in search of a meal. They may even drift into the range of human eyesight. This explains the fact that they have been sighted periodically from the earth since 1943．
1．The best statement of the main idea of this passage is that ________.
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A．captain Nash saw twelve orange lights traveling at a fantastic rate of speed
B．captain Nash may have been the first to see lights in space
C．according to an interesting theory, the orange lights are space animals
D．the mysteries of nature can be fully explained
2．The strange orange lights were first spotted ________.
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3．The theory says that during the daytime the space animals ________.
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4．If the apace animal theory is correct, the creatures descend to the lower regions in order to ________.
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A．escape direction
B．arouse curiosity
C．search for man-made energy
D．make contact with man
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