---What do you think of my answer to the question?----Sorry What’s that? I about somethi

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。