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Scientists have wondered for a long time if animals can learn to talk as human beings do. Several years【C1】______ , two psycholo
Scientists have wondered for a long time if animals can learn to talk as human beings do. Several years【C1】______ , two psycholo
admin
2014-09-24
25
问题
Scientists have wondered for a long time if animals can learn to talk as human beings do. Several years【C1】______ , two psychologists took a baby chimpanzee into their home and raised it as a member of their family. After six years, the chimpanzee had learned to say only four【C2】______ . Apparently, chimpanzees can not talk because they care physically unable to shape their mouths and move their tongues【C3】______ people do.
【C4】______, other scientists have been very successful in teaching chimpanzees to communicate in the sign language that is used by【C5】______ people. One chimp, a female named Washoe, has learned more than 160 signs. She knows signs【C6】______ nouns, verbs, adjectives, and various other parts of speech. She understands the meaning of the signs and【C7】______ to apply them to new situations.【C8】______ , she knows that the sign for "tree" means not just one tree, but all trees.
Several other chimpanzees are now being taught sign language. They are beginning to use signs to communicate with each other【C9】______ with their human trainers. Scientists are【C10】______ to see what will happen to an entire colony of chimpanzees if they learn sign language and use it among themselves.
【C1】
选项
A、after
B、later
C、ago
D、before
答案
C
解析
本题要求填入副词,A项after是介词可首先排除。从上下文看,这是应指几年以前,而不是几年以后,所以B项later与句意不符,C项ago和D项before都表示"在……以前",但由于before指相对于过去某一时间点之前,根据上下文,before用在此处语法上不合适,应选择C。
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