問題詳情
6. Human beings have been facing _____ challenges posed by environmental destruction, depleting naturalresources, and global warming. Without global-scale cooperation, the situation is expected to become evenmore dire.
(A) negligible
(B) reverent
(C) oblivious
(D) formidable
參考答案
答案：D
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)