______ at the outset, ______ instead of shifting things about may be pheromones

游客2023-10-14  6

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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