问题补充：
A modern city has been set up in was a wasteland ten years ago.
A. what
B. which
C. that
D. where
答案：
(答案→)A. what
B. which
C. that
D. where
解析：what引导的是名词性从句，在此作in的宾语，相当于the place that，同时在宾语从句中作主语；B项语意欠妥；C、D两项不合语法。句意为：“一个现代化的城市在前曾是荒地的地方建起来了”。
