单项选择题

Since chimpanzees are genetically very similar to humans, ______.

A．chimpanzees are likely to suffer AIDS just like humans if they are infected
B．it does not matter if human beings are infected with SIV rather than HIV-1
C．we can use human vaccines to prevent chimpanzees from getting AIDS virus
D．AIDS vaccines based on chimp's immune mechanism are possible to be made
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单项选择题
Which of the following best expresses the main idea of the passage
A．The current banking law must be interpreted by the Supreme Court to be useful to today's banks.
B．Although there are currently many bank failures, the nature of banking has not really changed that much.
C．Money-center banks currently have too much power as compared with the regional banks.
D．Because current laws are not responsive to contemporary banking needs, banks have been forced to take needless and dangerous risks.
单项选择题
Many AIDS experts are not completely satisfied with results of the study because ______.
A．only a limited number of chimpanzees are used for sampling the virus
B．it is now extremely difficult to find chimpanzees that carry the virus
C．the samples collected are from two different subspecies of chimpanzees
D．it does not provide reliable evidence of the link between SIV and HIV-1
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