心急如焚！！！英语达人请进，恳请帮忙详细解释一道语法填空题的答案，谢谢！！！

Question

接上：Those nine contestants, along (with) one "wild card "chosen by judges ,continue on to the next stage of the of the competition ,which takes place over several weeks.
该题出自一篇高考语法填空，括号内为所填答案，跪求英语高手帮忙详细解释一下为什么该空格要填“with”？谢谢！！！

Answer 1

1.该复合句的主语是Those nine contestants
2.along (with) one "wild card "chosen by judges 是一个伴随状语从句。
3.伴随状语从句是对主语的修饰。
4.along (with)是伴随状语从句的固定搭配。

Answer 2

A + along with + B = A + with/ together with/ as well as + B
是介词短语，表示两种情形：
1、带有；具有；持有……
2、以及/和 = and...

Answer 3

因为along with是个固定介词短语，表示跟某人在一起

Answer 4

固定搭配
along (with) one "wild card "chosen by judges 作伴随状语