Question

3．AIDS researchers say they still have much work to do on a vaccine （疫苗）against HIV．But the first reports of some success have raised hopes．（33）C 
The study was designed to test for two abilities．One was the ability of the vaccine to prevent HIV infections．The other was its ability to reduce the amount of virus in the blood of people who became infected during the study．
Volunteers received vaccinations over a period of six months and were tested for HIV for an additional three years．The study began in 2003．It was the largest AIDS vaccine trial yet．（34）F    Half received the vaccine．The other half received a placeho，an inactive substance （物质）．The volunteers did not know which they were getting．
Seventy-four people in the placeho group became infected during the study．（35）D  Doctor Supachai Rerks-Ngarm，who led the study for the Thai Ministry of Public Health，called it a scientific breakthrough．
The National Institutes of Health also took part．Doctor Anthony Fauci at NIH called the findings an important step forward．（36）G But he also said additional research was needed to better understand how the vaccine reduced the risk in those individuals．
The vaccine did not lower the amount of virus in the blood of volunteers who became infected during the study．The study was based on versions of HIV commonly found in Thailand．The volunteers received a combination of two vaccines．（37）A  The second，or booster，vaccine was developed by VaxGen．The nonprofit group Global Solution for Infectious Diseases now has rights to it．
Neither vaccine had been successful by itself when tested earlier．More detailed results of the study are expected to be presented at an AIDS vaccine conference in Paris next month．

A．The first，or prime，vaccine came from the Sanofi Pasteur company．
B．The AIDS vaccine raises hopes for those who get infected and will defeat the disease thoroughly．
C．Scientists say an experimental vaccine reduced the risk of infection in humans by thirsty-one percent and was safe．
D．The researchers say that was compared with only fifty-one of those who received the vaccine．
E．AIDS is a very serious phenomenon in Thailand．
F．It involved more than sixteen thousand adults in Thailand．
G．He said it represented the first time an investigational HIV vaccine had shown some ability to prevent infection．

Answer 1

分析 本文讲到艾滋病研究人员认为，关于对抗HIV的疫苗，他们仍然有许多工作要做．科学家说一种实验性疫苗降低了人类感染的风险，是很安全的．之后对该疫苗进行了研究．

解答 CFDGA
33．C联系下文题．根据后文The study was designed to test for two abilities．提到了一个实验研究．C项：Scientists say an experimental vaccine reduced the risk of infection in humans by thirsty-one percent and was safe．科学家说一种实验性疫苗降低了人类感染的风险，是很安全的．符合文意，故选C．
34．F语境辨析题．根据上文It was the largest AIDS vaccine trial yet．可知这是迄今为止规模最大的艾滋病疫苗试验．F项：It involved more than sixteen thousand adults in Thailand．泰国有一万六千多名成年人参与其中．符合文意，故选F．
35．D文章衔接题．根据上文Seventy-four people in the placeho group became infected during the study．可知研究期间，有74%的人被感染．D项：The researchers say that was compared with only fifty-one of those who received the vaccine．研究人员说，这是与接受疫苗的51%的人相比．符合文意，故选D．
36．G联系下文题．根据下文But he also said additional research was needed to better understand how the vaccine reduced the risk in those individuals．可知但是他也说需要更多的研究来更好地了解疫苗是如何降低这些人的风险的．G项：He said it represented the first time an investigational HIV vaccine had shown some ability to prevent infection．他说，这是首次研究性HIV疫苗显示了某种预防感染的能力．符合文意，故选G．
37．A文章衔接题．根据后文The second（第二种），or booster，…可知A项：The first，or prime，vaccine came from the Sanofi Pasteur company．第一种疫苗，或者是最早的疫苗来自赛诺菲-巴斯德公司．符合文意，故选A．

点评 在答题中，应首先略读各小题，了解一下大致意思，然后把几个选项含义理解透，尤其注意意思相近，表达有交叉的选项之间的区别．特别注意文章上下文的串联结构．然后再细读题目，选出正确答案．答题时可以把含义相近的几个选项轮流填入同一处位置，反复阅读，反复体会，找出最佳选项，对于实在没有把握的小题可以留待最后完成．