The government has announced that a modern city will be set up in is still a wasteland now .
A. what
B. which
C. that
D. where
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(答案→)A. what
B. which
C. that
D. where
解析：“ is still a wasteland now .”做介词in的宾语从句，从句中缺主语句意为：政府已经宣布一座现代化的城市将在这片现在仍是废墟的地方建成。