A mondern city has been set up in was a wasteland ten years ago.A what B which C that D where
熱心網友
A modern city has been set up in what was a wasteland ten years ago所以答案選a因為was 前面缺少主語，所以what 作主語，what was a wasteland ten years ago作為what引導的名詞性從句作in 得賓語這句話的意思：一座現代化的城市在十年前的一片廢墟上建立起來如果選擇that /which/where 的話就是作為定語從句，但是定語從句中 that /which/where 作為引導詞，他們的前邊必須要有要限定修飾的中心詞，但是這個題中in之后沒有中心詞，所以不能考慮定語從句，要考慮名詞性從句
熱心網友
A 因為這里what 后的內容充當狀語,which是定語從句的標記;這里缺少主語,只能由what充當
熱心網友
in后接賓語從句，賓語從句中缺少主語，要用what選A
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A mondern city which has been set up in ...答案 Ｂ
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選Ｂ吧
熱心網友
A mondern city has been set up in what (that) was a wasteland ten years ago.選A,然后省略了that