—What did Mr Black do in the middle of the night? —Well, I’m not sure, but he was often heard______.

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问题 —What did Mr Black do in the middle of the night? —Well, I’m not sure, but he was often heard______.

选项 A、singing the same song
B、to sing the same song
C、sing a same song
D、to be playing same song

答案A

解析 他经常被听到在唱同一首歌,应该用动名词形式。故本题选A。
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