Mr. Smith, _______ of the ______ speech, started to read a novel.

A．tired, boring

B．tiring, bored

C．tired, bored

D．tiring, boring

把市场划分为现货市场和期货市场的标准是（）

A商品流通顺序

B商品流通地域

C商品流通时间

D商品流通属性