--- Did you understand what the teacher said ?

---Yes! She explained the text in detail to make her lessons __________.

A．easy understood

B．easily to understand

C．easily understood

D．easy understand

黄连生用苦寒，长于泻火，若要增强其止呕作用，应选用的炮制辅料是

A．姜汁

B．酒

C．吴茱萸

D．醋

E．蜂蜜