1．The article is intended to ________.

　　A．explain the bad effects of drugs on people's health

　　B．warn young people of the risk of taking the drug Ecstasy

　　C．persuade people out of such bad habits as smoking and using drugs

　　D．tell us the links between the drug Ecstasy and Parkinson's disease

　　解析：主旨大意题。根据第3段最后一句话，第4段最后一句话，及最后一段，可以推断：作者的目的是想提醒人们，尤其是年轻人要远离摇头丸。

　　答案：B

　　2．We know from the passage that a low dose of Ecstasy ________.

　　A．won't cause serious brain damage

　　B．can permanently destroy one's brain cells

　　C．will result in immediate symptoms

　　D．may bring on Parkinson's at once

　　解析：事实细节题。由第1段第2句Just two or three Ecstasy tablets can permanently destroy brain cells及第2段中的．..both species suffered permanent damage...after receiving three low doses of Ecstasy...可知B项正确。

　　答案：B

　　3．Why are squirrel monkeys and baboons involved in the experiments?

　　A．Because their brain is similar to human being's.

　　B．Because these animals usually take drugs.

　　C．Because these animals will soon get well after the experiment.

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