I'm tired out. I        all afternoon and I don't seem to have finished anything.

A．shopped

B．have shopped

C．had shopped

D．have been shopping

源于橘的干燥幼果或未成熟果实的干燥果皮的药物是（）

A.橘络

B.橘红

C.橘核

D.青皮

E.化橘红