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 t0 d0 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。