--- What do you think of my suggestion?
--- I’m sorry. Er… I about something else.
A. thought
B. am thinking
C. was thinking
D. had thought
网友回答
A. thought
B. am thinking
(答案→)C. was thinking
D. had thought
解析：考查时态。句意：你认为我的建议怎么样？抱歉。我在想别的事。根据句意可知提建议是刚刚发生的事，要用过去时，而且我在想别的事，是说刚才提建议时我正在想，要用过去进行时。选C。