問題詳情

The construction company must pay to have archeologists _____ the historical sites.
(A)study
(B)studied
(C)studying
(D)to study

參考答案

答案:A
難度:適中0.429358
統計:A(468),B(172),C(189),D(151),E(0) #
個人:尚未作答書單:與過去事實相反的假設(if+主詞+had+pp)

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