So suddenly the disease that the whole family were at a great loss.
A. did he catch
B. he caught
C. was he caught
D. he was caught
网友回答
(答案→)A. did he catch
B. he caught
C. was he caught
D. he was caught
解析：在so/such…that…如此…以至于…的结构中，如果把so/such所引导的结构放在句首，后面的主句使用部分倒装的学生，只是把助动词，系动词，情态动词提前至主语前面，形成部分倒装的形式。句义：他很突然感染了这种疾病，让全家人都不知所措。BD两项没有使用部分倒装的形式，C项中不需要使用被动语态。故A正确。