問題詳情
39. Observers fear a catastrophe may occur ________ an oil tanker collide with a pirate ship.
(A) should
(B) if
(C) when
(D) to
參考答案
答案：A
難度：困難0.261905
統計：A(22),B(27),C(17),D(15),E(0)
用户評論
【a0939988368】評論
May 代表假設法,本題為if省略之未來事實相反假設，原句為if an oil tanken should collide with a pirate ship,省略if 動詞到主詞前面