81. We can learn from the beginning of the passage that ____.

1. a newly discovered antibody defeats 91% of the HIV strains
2. a new anti-retroviral drug has just come on the market
3. American researchers have developed a new vaccine for HIV
4. the African-American gay man was cured of his HIV infection

82. What is the implication of the antibodies discovered in the cells of the African-American gay man?

1. They can cure the 33 million AIDS patients in the world.
2. They may strengthen the effects of the existing anti-retroviral drugs.
3. They will kill all the HIV viruses.
4. They will help make a quick diagnosis of an HIV infection.

83. The newest antibody found in Donor 45 reflects a dramatic advance in terms of ____.

1. pathology
2. pharmacology
3. HIV neutralization
4. HIV epidemiology

84. According to the study authors, the three test methods are intended to ____.

1. advance the technology in condom production to prevent HIV infection
2. facilitate the natural immune defense against AIDS
3. develop more effective anti-retroviral drugs
4. develop a treatment for HIV/AIDS

85. The passage is most likely ____.

1. a news report
2. a paper in Science
3. an excerpt from an Immunology Textbook
4. an episode in a science fiction novel

(Reference keys.)