The boys ______ the newspaper on the ground and began to read the news and articles in it.

A．extended

B．expanded

C．spread

D．stretched

市场预测可以分为短期预测、中期预测和长期预测，这是按（）划分的。

A．预测期限

B．预测性质

C．预测范围

D．预测商品综合程度