----Did you see a child dressed in red pass by?
----Sorry, I _____ the poster on the board without noticing anyone.
A．have readB．had readC．a(chǎn)m readingD．was reading
D

試題分析：句意：你看見一個穿著紅色衣服的孩子從這經(jīng)過了嗎？對不起，我一直在看板子上的海報，沒有注意任何人。表示剛剛正在做某事，用過去進行時態(tài)的形式，故選D
點評：動詞的時態(tài)是學(xué)習(xí)英語過程中非常重要的知識。而很多的題目要通過上下文的判斷得知。過去進行時表示動作在過去的某個點時間正在進行，本題不難，平時加強記憶，理解即可。
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