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Look, so many people are running out of the station. I wonder what ________.
A．is happenedB．was happening
C．is happening D．had happened
C

試題分析：句意：看，這么多人正從車站里跑出來。我想知道發(fā)生了什么事。根據(jù)Look, so many people are running out of the station.可知此處人們正從車站跑出來，表示正在發(fā)生的事，故選C。
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