单项选择题
The female the author is narrating in this text ______.
A.lives in New Jersey
B.gets off at the 175th street station
C.says to him, "Nice day, isn't it"
D.carries a newspaper or a book on the way
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单项选择题
The author dreams of making friends with this female not beause ______.
A.she has a sweet face, a natural way and behaves gracefully
B.the author himself is kind of shy and doesn't make friends easily
C.She offers to talk with the author and smiles at him pleasantly
D.the author is deeply attracted by her graceful manners and sweet appearance
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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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prevail
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