题目

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：B 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。Don't drive so fast! We must slow down when we drive ________ the tunnel.A. past B. across C. over D. through