— What else did you do this morning  besides doing the shopping?

— Two hours ____ washing the windows and floor.[ ]

A. were taken                    

B. was spent

C. has taken                      

D. will be spent

(1)板蓝根外包装上的标志表示板蓝根是_______药。

(2)根据说明书中“功能主治”的内容可知，板蓝根可以预防和治疗______。

(3)如果保质期是三年，那么有效期应该至______年______月。