----Tony,youlookpuzzled.Haveyouunderstoodme?  ----I’ms...

问题详情：

 ---- Tony, you look puzzled. Have you understood me ?

   ---- I’m sorry. I _____ another problem just now.

     A. thought of                  B. am thinking of

     C. had thought of               D. was thinking of

【回答】

D

知识点：过去进行时及其被动式

题型：选择题