問題詳情

13. Recent studies have shown that abrupt climaticchanges occur more frequently _____.
(A)than scientists anticipated
(B)than are anticipated by scientists
(C)than do scientists anticipate
(D)than scientists will anticipate

參考答案

答案:A
難度:簡單0.772727
統計:A(51),B(5),C(4),D(2),E(0)

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