At present production levels, _________ deposits of bauxite can provide the world with aluminum

問題詳情

78. At present production levels, _________ deposits of bauxite can provide the world with aluminum for hundreds of years.

(A) known

(B) known are

(C) they are known

(D) what is known

參考答案

答案：A
難度：困難0.384615
統計：A(5),B(3),C(0),D(4),E(0)

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