----Did you see a child dressed in red pass by?
----Sorry, I the poster on the board without noticing anyone.
A. have read
B. had read
C. am reading
D. was reading
网友回答
A. have read
B. had read
C. am reading
(答案→)D. was reading
解析：句意：你看见一个穿着红色衣服的孩子从这经过了吗？对不起，我一直在看板子上的海报，没有注意任何人。表示刚刚正在做某事，用过去进行时态的形式，故选D