It is ________ the customers’ needs that has made chain stores so popular in big cities in China.

A．meeting

B．met

C．to have met

D．being met

大黄用治湿热黄疸，常与下列何药配伍（）

A.芒硝

B.苍耳子

C.牛蒡子

D.栀子

E.附子