問題詳情

18. As more and more species are faced with extinction, how to sustain biodiversity is     great significance to human beings. 
(A)under 
(B)of 
(C)about 
(D)beyond

參考答案

答案:B
難度:適中0.5
統計:A(1),B(2),C(1),D(0),E(0)

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