問題詳情

40.A: Is there any discount? B:There is a ten-percent_____  ,
(A) back  
(B) through  
(C)off   
(D) with

參考答案

答案：[無官方正解]
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)