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A．Different cultures and customs.
B．The woman’s first year at university.
C．Things that the woman is doing now.
D．The foreign roommates of the woman.
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单项选择题
Why are health workers with HIV banned from performing certain medical tasks
A．Because they may infect patients by accident.
B．Because they are too weak to operate on the patients.
C．Because they are not, capable of doing their jobs well.
D．Because they are likely to get infected with other viruses.
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