問題詳情

20. To prevent sewage from entering the waterways and protect public health, the city councilman strongly demanded that the sewage system _________ in three months.
(A)improved 
(B)to improve 
(C)was improved 
(D)be improved

參考答案

答案：D
難度：適中0.591592
統計：A(26),B(31),C(51),D(197),E(0)

用户評論

【冒險男】評論

為何呢？

【必上榜】評論

原句that the  sewage system should be improved in three months.should省略

【業精於勤，事立於豫】評論

demand that (should) + 原形V