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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