—You came back from Beijing yesterday. Could you tell me ?

—I went there by train.

A.how you went there B.who you went with

C.what you think of the trip D.if you enjoy the trip

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C

Researchers at Wake Forest University Medical Center did a research in monkeys and it could provide a clue (提示) about how the brain manages plenty of information and remembers what it needs. They found that when monkeys were taught to remember computer art pictures, their brains reduced the level of information by sorting the pictures into several kinds for recall, such as pictures that have to do with “people”，“buildings”，“flowers” and “animals”.

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