单选题 Questions 1--3 Choose the best answer.

单选题 Cannabis ______.

A、 is praised for its potential for treating pain and cancer by scientists
B、 is considered a dangerous drug without any medical use by many governments
C、 is now used to treat cancer in the USA
D、 has been used in medicine for thousands of years

【正确答案】 B

【答案解析】Paragraph 2: In reality, cannabis has been with humanity for thousands of years and is considered by many governments to be a dangerous drug. 文中出现了Scientists would praise its potential for treating everything from pain to cancel. 这是虚拟语气，所以应排除选项A。选项C和D都没有证据支持。

单选题 The IOM report ______.

A、 found that the use of marijuana in medicine can be justified scientifically
B、 showed that marijuana smoke contains the same harmful substances as tobacco smoke
C、 came to the same conclusion as the FDA statement
D、 was funded by the University of Nebraska

【正确答案】 A

【答案解析】应以IOM为线索寻找答案。Paragraph 3: …a report made in 1999 by the Institute of Medicine(IOM),…, which came to a different conclusion. John Benson,…, found some sound scientific information that supports the medical use of marijuana for certain patients for short periods…，据此可以排除C，选项B和D都没有相关信息支持。

单选题 Marinol is ______.

A、 preferred by users for its advantages in effectiveness over marijuana
B、 found useful especially by AIDS and cancer patients
C、 licensed by the FDA as a substitute for marijuana
D、 can be obtained only on the black market

【正确答案】 C

【答案解析】Paragraph 5: …the FDA has licensed a drug called Mrarinol, a synthetic version…Unfortunately, many users of Mrarinol complain that… 首先根据这一内容可以排除A，根据同一段的其他内容，选项B和D都是对cannabis的描述。