问题描述: join和join in的用法 1个回答 分类:英语 2014-11-22 问题解答: 我来补答 1 joinjoin the army ,join the Party ,join the clubjoin my friends in a ball game ,join Mary in her conversation2 join in== take part in join in the tree planting activity join in the reading contest join in the school sports 展开全文阅读