单项选择题

The HIV virus has caused more deaths in developed countries.

A． Right
B． Wrong
C． Not mentioned
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单项选择题
The idea of using HIV for a beneficial purpose has been widely accepted.
A． Right
B． Wrong
C． Not mentioned
单项选择题
The book provides a concise analysis of the country's history.
A．clean
B．perfect
C．real
D．brief
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