I am afraid that Mrs. Black doesn’t believe her son is able to design such a complicated m

问题补充：

I am afraid that Mrs. Black doesn’t believe her son is able to design such a complicated machine,?

A. does she

B. aren’t I

C. is he

D. isn’t he

答案：

(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。