Some drivers are warning the vehicles _____ behind them, such as "Don't follow me, I lost my way

too" and "Be off. I'm married".[ ]

A. to run          

B. running          

C. having run            

D. having been run

众所周知，苯分子的环状结构的发现一直是化学史上的一个趣闻.它是由一位化学家从梦中得到启发而成功提出的.请问这位化学家是（）

A.法拉第

B.凯库勒

C.米希尔里希

D.勒夏特列