单项选择题
A．They have fallen prey to wolves. B．They have become a tourist attraction. C．They have caused lots of damage to crops. D．They have become a headache to the community.
A．She is an interpreter. B．She is a tourist guide. C．She is a domestic servant. D．She is from the royal family.
A．It in an uncommon infectious disease. B．It destroys the patient’s ability to think. C．It is a disease very difficult to diagnose. D．It is the biggest crippler of young adults.