She was afraid the dog in case it became dangerous.A. of excitingB. to exciteC. that she

问题补充：

She was afraid the dog in case it became dangerous.

A. of exciting

B. to excite

C. that she excited

D. to be exciting

答案：

A. of exciting

(答案→)B. to excite

C. that she excited

D. to be exciting

解析：be afraid后面既可以跟不定式be afraid to do sth．，又可以跟动名词be afraid of doing

sth．，但前者的意思是：害怕/不敢做某事；后者的意思为：对可能出现的结果的发愁或忧虑。