問題詳情
Freshwater aquaculture operations tend to draw off excessive amounts of the groundwater, sometimes _________ the surrounding land to shift or cave in.
(A) to cause
(B) it causes
(C) causing
(D) caused
參考答案
答案：C
難度：簡單0.795455
統計：A(8),B(23),C(210),D(11),E(0)
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