Although he was in poor health, Robert succeeded other more famous engineers failed.
A. which
B. that
C. what
D. where
网友回答
A. which
B. that
C. what
(答案→)D. where
解析：本句意为“尽管罗伯特身体不好，但是他在其他著名的工程师失败的领域里获得了成功。”这里是由where引导的地点状语从句，在“…领域”是个抽象概念，但是在句中相当于地点状语。