They joined the chess club two years ago 等于（2个控可填缩写）two years(一个空they joined the
问题描述：
They joined the chess club two years ago 等于（2个控可填缩写）two years(一个空they joined the
They joined the chess club two years ago 等于（2个控可填缩写）two years(一个空）they joined the chess club那3个控要怎么填啊求大神指导
答
填入【Ever】【since】……【before】