問題詳情
16. ___________over a million different species of insects exist in the world, more than all otheranimal species combined.
(A) It is estimated that
(B) There is estimate
(C) That is estimated
(D) The estimate is
參考答案
答案：A
難度：簡單0.86875
統計：A(139),B(6),C(8),D(5),E(0)
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