2. 外语
  3. ______ at the outset, ______ instead of shifting things about may be pheromones released when they reach committee size.

______ at the outset, ______ instead of shifting things about may be pheromones released when they reach committee size.

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问题 ______ at the outset, ______ instead of shifting things about may be pheromones released when they reach committee size.
选项 A、The stimuli set them off... build collectively
B、The stimuli that set them off... building collectively
C、The stimuli setting them off... they build collectively
D、Being set off by stimuli... their building collectively
答案B
解析 本题的重点在于理清句子结构。本句主语the stimuli同时也是定语从句that set them off at the outset的先行词，句子谓语是may be，而building collectively是分词短语作状语。
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本试题收录于： A类竞赛（研究生）题库大学生英语竞赛（NECCS）分类
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A类竞赛（研究生）

大学生英语竞赛（NECCS）

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