The parents rushed to the school, only that their son had left without a word.
A. to tell
B. to be told
C. being told
D. having told
网友回答
A. to tell
(答案→)B. to be told
C. being told
D. having told
解析：考查状语。only to do表示意想不到的结果。逻辑主语The parents与tell为被动关系，故选B。