问题补充:
---What do you think of my answer to the question?
----Sorry, What’s that? I about something else.
A. am thinking
B. was thinking
C. had thought
D. thought
答案:
A. am thinking
(答案→)B. was thinking
C. had thought
D. thought
解析:句意:你认为我对这个问题的答案怎么样?——抱歉,那是什么?我正在想一些其它的事情。结合语境可知下文描述的是刚才正在进行的动作,故用过去进行时态,选B。