問題詳情

15.The oil on the umbrellas helps to protect them from water, _______?
(A) doesn’t it 
(B) don’t they 
(C) isn’t it 
(D) aren’t they

參考答案

答案:[無官方正解]
難度:非常困難0
統計:A(0),B(0),C(1),D(0),E(0)