气厥虚证亦有反复发作的倾向，平时可服下列哪些方药（）

A.香砂六君子汤

B.四味回阳饮

C.人参养荣汤

D.甘麦大枣汤

E.逍遥散

All the commodities sold in that shop are given one year's ______.

A．assurance

B．warrant

C．guarantee

D．insurance