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)