单选题 {{B}}第三篇{{/B}}
{{B}} New Attempts to Eradicate AIDS Virus{{/B}}
A high-profile attempt to eradicate the AIDS virus in a few patients continues to show promise.
But researchers won't know for a year or more whether it will work, scientist David Ho told journalists here Wednesday for the Fourth Conference in Viruses and Infections.
"This is a study that's in progress," says Ho, head of the Aaron Diamond AIDS Research Center, New York.
The study involves 20 people who started combinations of anti-HIV drugs very early in the course of the disease, within 90 days of their infections. They've been treated for up to 18 months. Four others have dropped out because of side effects or problems complying with the exacting drug system.
The drugs have knocked the AIDS virus down to undetectable levels in the blood of all remaining patients, s And, in the latest development6, scientists have now tested lymph nodes and semen from a few patients and found no virus reproducing there, Ho says. "Bear in mind that? undetectable does not equal absent," Ho says.
Ho has calculated that the drugs should be able to wipe out remaining viruses -- at least from known reservoirs throughout the body -- in two to three years. But the only way to prove eradication would be to stop the drugs and see if the virus comes back8. On Wednesday, Ho said he wouldn't ask any patient to consider that step before 2
单选题 According to the passage, the attempt to eradicate the AIDS virus
【正确答案】 A
【答案解析】这个问题要结合第一段和第二段来考虑，A high-profile attempt．．．continues to show promise．But researchers won't know for a year or more whether it will work．．．所以只有A项符合题意。
单选题 Which is NOT true about the study?
【正确答案】 D
【答案解析】这个问题的信息集中在第四段，只有D项与原文Four others have dropped out because of side effects．．．不符，应为Four patients did not go through the whole study．
单选题 What do Ho's words "Bear in mind that undetectable does not equal absent" mean?
【正确答案】 A
【答案解析】对这句话的理解要结合第五段整体考虑。该段开头说The drugs have knocked the AIDS virus down to undetectable levels in the blood．．．最后引用专家的话undetectable does not equal absent，联系起来看只有A项符合这句话在文章中的意思。
单选题 How could we prove that the drugs have wiped out the remaining viruses?
【正确答案】 D
【答案解析】此题的依据是第六段的一句话But the only way to prove eradication would be to stop the drugs and see if the virus comes back．
单选题 Other scientists are looking at experiments that are similar in that they are
【正确答案】 D
【答案解析】结合全文看，这类实验被描写为aggressive，即大胆的，从内容看，减药停药等均属创新，而费用方面文章没有涉及。