So sudden ______ that people in the building had no time to escape.
A、
the attack was
B、
the attack did
C、
was the attack
D、
did the attack
【正确答案】
C
【答案解析】
so…that…引导结构状语从句时,若so位于句首,其后的句子需部分倒装。由于sudden是形容词,因此要用be动词was,选C。
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