I saw ___ boy and ___ old woman sitting at the table.I thought ___ old woman must be ___ boy’s grandma.

A．a…a …the…the

B．a..an…the..the

C．the..the…a …a

D．a…an…an…the

下列各项中，除哪项外，均是镇肝息风汤的组成药物（）

A.白芍、甘草

B.龟板、牡蛎

C.龟板、牛膝

D.白芍、牡蛎

E.鳖甲、天麻