题目内容
完形填空
About ten men in every hundred 1 from colour blindness in some 2 , women are 3 only about one in two hundred is 4 in this manner. Perhaps, sooner or later, it is 5 to be driven by a woman.
There are 6 forms of colour blindness. In some cases (病例) a man 7 not be able to 8 deep red. He may think that red, orange and 9 are all shades of green. Sometimes a person cannot 10 the difference between blue and green. In 11 cases an 12 man may see everything is shades of green 13 world in deed.
Sometimes colour blindness can be 14 . For example, when fighting in the forest 15 , soldiers use 16 to signal(发信号) to each other.A green light may mean “ 17 ” and a 18 light may mean “Danger. Keep 19 ”. You can see what will 20 if somebody thinks that red is green.
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A.watch B: notice
C.observe
D.see
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15.
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A.in the morning
B.in the afternoon
C.at noon
D.at night
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20.
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