托福考试

根据网考网考试中心的统计分析，以下试题在2019/5/27日托福考试习题练习中，答错率较高，为：40%
【单选题】 According to the passage, why do ants use different compounds as trail pheromones
A．( To reduce their sensitivity to some chemicals
B．( To attract different types of ants
C．( To protect their trail from other species
D．( To indicate how far away the food is

网考网参考答案：C，答错率：40%
网考网试题解析：
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