根据《野生药材资源保护管理条例》，国家对野生药材物种实行()

A．保护、采猎相结合的原则

B．严格管理的原则

C．严禁采猎的原则

D．限量出口的原则

E．计划收购的原则

Mary made coffee ________ her guests were finishing their meal.[ ]

A．so that  

B．although

C．while  

D．as if