单项选择题

It can be concluded from the passage that ______.

A．all HIV carriers are doomed to die
B．only those who show clinical evidence of AIDS will pass on the virus
C．the number of AIDS cases will be reduced in the 1990s
D．IV drug users are a high-risk group vulnerable to AIDS infection

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单项选择题

According to the passage, which of the following statements is CORRECT

A．Discrimination against people with AIDS is declining.
B．Homosexuals have been harassed for being possible HIV carriers.
C．HIV is transmitted through physical contact of any sort.
D．The fear of AIDS will inevitably change people's sexual behavior.

单项选择题

Which of the following is NOT mentioned as a high-risk group in danger of contracting AIDS

A．People engaged in the business of entertainment.
B．Homosexual and bisexual men.
C．Intravenous drug users.
D．Poor urban residents.