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  3. Drugs have been a part of the American story since the very first day Columb

Drugs have been a part of the American story since the very first day Columb

游客2023-09-06  13
问题     Drugs have been a part of the American story since the very first day Columbus landed in the New World. The Taino Indians【B1】______Columbus with a gift of tobacco, which would go on to become one of the most important drugs in our history. And if drugs have existed since the beginning, so have drug problems. And so have【B2】______to solve those drug problems.
    Since the 19th century when Americans first discovered new【B3】______drugs like heroin and cocaine, the whole society has【B4】______the problem of drug abuse and【B5】______.
    When the 20th century began, the United States —【B6】______with its first drug epidemic —gradually set up【B7】______restrictions: at home through domestic law【B8】______and overseas by starting a world movement to limit opium and coca crops.【B9】______. The first epidemic was forgotten.
    During the 1960s, drugs like marijuana and psychedelics came on the scene, and a new generation embraced drugs.【B10】______. In 1973, the U. S. Drug Enforcement Administration was created to enforce federal drug laws. In the 1970s, cocaine reappeared. Then, a decade later, crack appeared, spreading addiction and violence at epidemic levels.
    Today, the DEA’s biggest challenge is the dramatic change in organized crime.【B11】______ [br] 【B4】
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答案 confronted
解析 Since引导的时间状语和空前的has表明，时态为现在完成时，本空应填一过去分词形式的动词。
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