OG 12-103 的句子结构求解

chriswendy35

103. Yellow jackets number among the 900 or so species of the world's social wasps, (wasps that live in a highly cooperative and organized society consisting almost entirely of) females - the queen and her sterile female workers.

这是正确答案选B的完整句子.
我有三个疑问:1. 本句子主句谓语是哪个? 是 'number' 吗?
2. 'or so pecies of the world's social wasps,' 这里怎么翻译 'or so pecies...'放在一起怎么翻译
3. 划线的从句 'wasps that live in a highly cooperative and organized society........', 为何要用'wasps'开头, 虽然是补充说明social wasps, 为何不直接接 which 而是 'wasps that', 是什么结构的从句呢?

xiaochangshni

1。主语 Yellow jackets     谓语 number     number among有“作为整体一员”的意思
2。or so是大概的意思，在这里修饰900，不是修饰species，900种左右的social wasps
3。用which语法上没问题，wasps作social wasps的同位语，that 引导修饰wasps的定语从句

chriswendy35

了解了, 非常感谢.