—Jim,have you finished reading Harry Potter and Half-Blood Prince?

—No.I______ my father on the farm all day yesterday.

A．would help

B．had helped

C．was helping

D．have been helping

病人对医生产生不满的原因有（）

A.医生年轻

B.对医生不信任

C.健康因果观不正确

D.被动接受治疗

E.对自身问题和治疗方案迷惑不解