問題詳情

(  )19.You need to make sure to have enough food and water ________ a couple of days.
(A) for 
(B) when 
(C) in 
(D) after

參考答案

答案:A
難度:適中0.644068
統計:A(38),B(5),C(13),D(1),E(0)

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