为什么下面的interreaction不需要用复数？谢谢！（答案没有问题）
108. To classical scholar, rhetoric was important in three spheres of human interaction: in law courts, in legislative assemblies, and in public forums.
答案：A
分析及考点：可数名词单复数问题。改成scholars 参考译文：对正统的学者来讲，花言巧语在人类交流中三个方面法庭辩论，立法汇编和公众讨论中比较重要。 | 
