Heard this ,the man was so surprised that he nearly dropped the box on his feet.改错题.一处.

Heard this ,the man was so surprised that he nearly dropped the box on his feet.改错题.一处.
Heard this ,the man was so surprised that he nearly dropped the box on his feet.
改错题.一处.

Heard this ,the man was so surprised that he nearly dropped the box on his feet.改错题.一处.
heard改为hearing
因为动作hear同样是主语the man的动作,
此处不应用过去分词,而应该用现在分词

hearing this

Heard改成Hearing，因为是主动语态。

或者 heard改为 Having heard
动作有先后顺序的