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单项选择题

Environmental awareness hardly exists since most countries are more concerned【C1】______economic development【C2】______with global ecology. Increasing environmental damage 【C3】______has caused some countries to【C4】______new environmental initiatives. Canada has protected its【C5】______supply by closing areas to fishing【C6】______setting strict limits on catches of certain【C7】______. As a result, some fish like herring eventually【C8】______, but some like cod may never recover, and【C9】______40,000 fishermen are unemployed because of 【C10】______fishing bans and the reduced【C11】______of fish. To protect its【C12】______rain forest, Costa Rica has【C13】______a series of new environmental laws and【C14】______parks and nature preserves that【C15】______one quarter of the country. Under pressure from environmentalists around the world, Brazil【C16】______to protect【C17】______Amazon rain forest but Amazon Indians【C18】______endangered【C19】______the conflict with【C20】______people who continue to destroy the forests.

【C19】
A．at
B．in
C．on
D．about
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