问题
选择题
I didn't hear you because I _______ the news on the radio.[ ]
A. listen to
B. am listening to
C. listened to
D. was listening to
答案
答案：D
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I didn't hear you because I _______ the news on the radio.[ ]
A. listen to
B. am listening to
C. listened to
D. was listening to
答案：D