that he could not speak for a long time. A. so frightened was heB. so frightened he wasC.

问题补充：

that he could not speak for a long time.

A. so frightened was he

B. so frightened he was

C. was he so frightened

D. frightened was he

答案：

(答案→)A. so frightened was he

B. so frightened he was

C. was he so frightened

D. frightened was he

解析：考查so…that…句型的倒装，so+adj/adv提前到句首，用部分倒装，be动词提前，句意是：他是如此害怕以至于很长时间不能说话。选A。