Hearing the sound, a group of students came to see what had happened. [ ] A.runB
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![Hearing the sound, a group of students came to see what had happened. [ ] A.runB](/pic/43_987178.jpg)
Hearing the sound, a group of students came ________to see what had happened.
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A.runB.runningC.and ranD.to run试题答案
答案:B