单项选择题
A．advantages B．blossom C．brains D．brilliant E．deserve F．gravely G．head H．influence I．intelligent J．nearly K．parental L．problems M．produce N．shaped O．survives
A．The treatment can be used widely someday. B．The treatment will destroy the immune system. C．The current drug can increase a patient’s risk of cancer. D．The result of the study doesn’t satisfy the researchers.