单项选择题

If the space animal theory is true, the creatures go down to the lower regions in order to_______.

A．escape detection
B．arouse curiosity
C．search for man-made energy
D．make contact with man
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单项选择题
The strange orange lights were first seen_______.
A．from the ground
B．from a rocket ship
C．during World War I
D．during World War Ⅱ
单项选择题
The best statement of the main idea of this passage is that_______.
A．Captain Nash saw twelve orange lights moving 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 completedly explained
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