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  3. Homing pigeons are placed in a training program from about the time they are twenty-eight days of age. They are taught to enter

Homing pigeons are placed in a training program from about the time they are twenty-eight days of age. They are taught to enter

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问题     Homing pigeons are placed in a training program from about the time they are twenty-eight days of age. They are taught to enter the loft (鸽房) through a trap and to exercise above and around the loft, and gradually they are taken away for short distances in baskets and released. They are then expected to find their way home in the shortest possible time.
    In their training flights or in actual races, the birds are taken to pre-arranged distant points and released to find their way back to their own lofts. Once the birds are liberated, their owners, who are standing by at the home lofts, anxiously watch the sky for their return. Since time is of the essence, the speed with which the birds can be directed to enter the loft trap may make the difference between gaining a win and a second place.
    The head of a homing pigeon is comparatively small, but its brain is one quarter larger than that of the ordinary pigeon. The homing pigeon is very intelligent and some have been known to fly a hundred miles off course to avoid a storm.
    Some homing pigeon experts claim that this bird is gifted with a form of built-in radar that helps it find its own loft after hours of flight, for the birds have two very sensitive ears hidden under the head feathers, while the sharp, prominent eyes can see great distances in daytime.
    Why do homing pigeons fly home? They are not unique in this inherent skill; it is found in most migratory birds (候鸟) , and in bees, ants, toads and even turtles, which have been known to travel hundreds of miles to return to their homes. But in the animal world, the homing pigeon can be trusted with its freedom and trained to carry out the missions that people demand.
According to the passage, what happens to homing pigeons when they are about a month old?
选项 A、They are kept in a trap.
B、They enter their first race.
C、They begin a training program.
D、They start their first distant flight.
答案C
解析 细节理解题。由第一段第一句可知，当家鸽大约在28天时就要接受训练。故选C。
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