問題詳情

25. ( ) A:Did you see Helen at eleven this morning?B:Yes, she _______ the floor then.
(A) is mopping .
(B) was mopping
(C) mopped
(D) mops

參考答案

答案:B
難度:適中0.47619
統計:A(1),B(10),C(5),D(4),E(0)