Tom raised his hands as if ______ something．

B

本题考查状语从句。此举是省略句，补充完整应是Tom raised his hands as if (he was going) to say something. 句意：汤姆举起手好像要说什么。如果as if 引导的从句是“主语+系动词”结构，可省略主语和系动词，这样as if 后就只剩下名词、不定式、形容词(短语)、介词短语或分词。