单项选择题

HIV can be safely used to cure cancer only if the deadly genes have been removed.

A． Right
B． Wrong
C． Not mentioned
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单项选择题
Other countries are also expected to begin clinical gene therapy trials soon.
A． Right
B． Wrong
C． Not mentioned
单项选择题
The HIV virus is an excellent warrior to fight the body's immune cells.
A． Right
B． Wrong
C． Not mentioned
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