— You were not in when I dropped in on you yesterday evening.

— Oh, so sorry. I ____ at the railway station for my sister from Beijing. [ ]

A. waited

B. had waited

C. was waiting

D. have been waiting

不宜与甘遂、大戟、芫花同用的是（）

A.甘草

B.巴豆

C.乌头

D.三棱

E.藜芦