31. What can we learn from the experiment with chimps?

　　A. Chimps seldom care about others?interests.

　　B. Chimps tend to provide food for their children.

　　C. Chimps like to take in their neighbors?food.

　　D. Chimps naturally sarhare food with each other.

　　32. Michael Tomasello抯 tests on young children indicate that they____.

　　A. have the instinct to help others

　　B. know how to offer help to adults

　　C. know the world better than chimps

　　D. trust adults with their hands fulll

　　33. The passage is mainly about ____.

　　A. the helping behaviors of young children

　　B. ways to train children抯 shared intentionality

　　C. cooperation as a distinctive human nature

　　D. the development of intelligence in children

　　B

　　El Nifio, a Sspanish term for 搕he Christ child? was named by South American fisherman who noticed that the global weather pattern, which happens every two to seven years, reduced the amount of fishes caught around Christmas. El Nifio sees warm water, collected over sefiveral years in the western Pacific, flow back eastwards when winds that normally blow westwards weaken, or sometimes the other way round.

　　The weather effects, both good and bad, are felt in many places. Rich countries gain more from powerful Nifio, on balance, than they lose. A study found that a strong Nifio in 1997-98 helped American抯 economy grow by $15 billion, partly because of better agricultural harvests, farmers in the Midwest gained from extra rain. The total rise in agricultural in rich countnries is greater than the fall in poor ones.

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