問題詳情
18. _____ that the world’s population will reach ten billion by the year 2020.
(A) Its estimation
(B) It is estimation
(C) It is estimated
(D) There is estimated
(A) Its estimation
(B) It is estimation
(C) It is estimated
(D) There is estimated
參考答案
答案：C
難度：簡單0.764706
統計：A(2),B(4),C(26),D(2),E(0)
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