-- Shirley, what were you doing at three o’clock yesterday? I was sitting by the window

-- Shirley, what were you doing at three o’clock yesterday?
-- I was sitting by the window, to the music.
A. listen
B. listening
C. listened
D. to listen

A. listen(答案→)B. listeningC. listenedD. to listen解析：本句的意思是“我正坐在窗户旁，听音乐。”根据句意可知，本处的“听”实际上与“坐”是同时的，因为前面有逗号，故应该用分词来表示伴随的情况。所以本题选B。

就是这个解释

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