单项选择题
A．He’’d like a piece of pie. B．He’’d like some coffee. C．He’’d rather stay in the warm room. D．He’’s just had dinner with his friends.
A．Social work. B．Medical care. C．Applied physics. D．Special education.
A．How animals survive harsh conditions in the wild. B．How animals alter colors to match their surroundings. C．How animals protect themselves against predators. D．How animals learn to disguise themselves effictively.