Having been attacked by terrorists. ． A．doctors came to their rescue B．the tall

 Having been attacked byterrorists，________．

   A．doctors came totheir rescue              B．the tall building collapsed

   C．an emergencymeasure was taken         D．warnings were given to tourists

试题答案

【答案】

 B分词作状语时，它的逻辑主语应与句子的主语一致。由前面分词的语态可知，句子的主语应该是the tall building。