一道英语选择题,求详解So sudden______that the enemy had no time to eacape.A.did the attackC.was the attack但我不明白为什么选C,选A不可以吗?

问题描述:

一道英语选择题,求详解
So sudden______that the enemy had no time to eacape.
A.did the attack
C.was the attack
但我不明白为什么选C,选A不可以吗?