题目内容

—Tony , you look puzzled . Have you understand me ?

—I’m sorry. I        another problem just now .

A.have thought of                                         B.am thinking of

C.had thought of                                           D.was thinking of

练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网