单项选择题

What is the passage mainly about

A．AIDS study raises hopes for gene therapy treatment.
B．A new killer of HIV virus.
C．Research on gene therapy.
D．Gene therapy proves to be the ultimate solution to HIV infection.

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单项选择题

The gene therapy can curb HIV infection by______.

A．helping healthy cells withstand the ravages of HIV virus
B．completely stopping the infected cells from spreading
C．considerably inhibiting the tat gene from working
D．isolating HIV virus from the healthy cells

单项选择题

According to Dr. Stuart Starr,______.

A．the other options proved totally unsuccessful
B．everyone knows how to deal with HIV virus effectively
C．the new therapy is but one among a number of options
D．the new approach might take the place of other therapies