Tamarins lost the paradise of their tree-bound niche mainly because the Portuguese __________.
A、cut down trees to make rooms of the houses
B、cleared the forests to set up cities and farms
C、deforested some regions for playgrounds
D、hunted the most distinctive monkeys
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试题解析
本题是细节题。第三段第一句讲到：不幸的是，葡萄牙人抵达巴西后开始清除森林以便能够腾出空地修建里约热内卢（巴西的城市）、定居地和农田，绢毛猴赖以生存的生活环境就开始消失了。(Unhappily for the lion tamarins，their tree-bound niche began to disappear after the Portuguese landed in Brazil and began clearing forest to make room for Rio de Janeiro，the settlements and farms.)，因此答案为B。
