I would appreciate _____ very much if you could give me some suggestions.

A．this

B．that

C．it

D．you

不属于按市场特性和开发现状分类的旅游资源类型是（）。

A、潜在的旅游资源

B、现有的和即将开放的旅游资源

C、特殊性旅游资源

D、市场性旅游资源