单项选择题


A．prevention
B．obstacle
C．stop
D．way
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单项选择题
A．establishesB．buildsC．foundsD．erects
A．establishes
B．builds
C．founds
D．erects
单项选择题
According to the report, how many people are HIV-positive worldwide
A．22 million.
B．36 million.
C．25 million.
D．58 million.
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