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
单项选择题 FDA has approved the plan of using HIV to cure cancer in humans.（）
单项选择题 The idea of using HIV for a beneficial purpose has been widely accepted.（）
单项选择题 The fuel tanks had a capacity of 140 liters.（）
