she is afraid of _______

C
介词+doing
且为被动语态
且laugh at+人

选 being laughed at
她怕被嘲笑

c

laughed
被人笑

C

be afraid of + dong

laugh at 嘲笑（主动）
be laughed at 嘲笑（被动）

She is afraid of being laughed at .

O(∩_∩)O~

being laughed at
be afraid of后面用doing sth.在这里laugh at根据句意要用其被动。