单项选择题
A．At a country school in Mexico. B．At a small American college. C．In a mountain valley of Spain. D．In a small village in Chile.
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 effectively.
A．She met with Thomas just a few days ago. B．She can help with the orientation program. C．She is not sure she can pass on the message. D．She will certainly try to contact Thomas.