I am afraid that Mrs. Black doesn’t believe her son is able to design such a plicated machine, ?
A. does she
B. aren’t I
C. is he
D. isn’t he
网友回答
(答案→)A. does she
B. aren’t I
C. is he
D. isn’t he
解析：句意：恐怕布莱克太太不相信她的儿子会设计这样一个复杂的机器,是吗? I am afraid此处相当于I think，反意疑问句的陈述部分为I(We) think(believe, suppose, consider) + that从句时，问句部分的动词及主语与that从句内的动词和主语保持一致，所以它的反意疑问句是does she。故选A。
考点: 考查反义疑问句的用法。