So sudden ________that the enemy had no time to escape.
A．did the attack B．the attack did
C．was the attack D．the attack was
So sudden ________that the enemy had no time to escape.
A．did the attack B．the attack did
C．was the attack D．the attack was
C [考查倒装结构。在so...that结构中，“so＋形容词/副词部分”位于句首时，主句的主谓一般采用部分倒装形式，如果谓语动词为be的一般现在时或一般过去时，则使用完全倒装形式。本句的正常语序为“The attack was so sudden that the enemy had no time to escape”，故选C项。]