He smiled and waved to the crowds him,A. waited forB. waiting forC. waitedD. waiting

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A. waited for
(答案→)B. waiting for
C. waited
D. waiting
解析：考查现在分词做定语：句意：他微笑着向等着他的人群挥手。等待“wait for“，因为是定语，而且是主动关系，用现在分词做定语，选B。