6、②A:Ialwaysforgetthenewwords.B:Youcanwritethenewwordsinyournotebookandstudythemathome.Maybe you shouldjoinan English club.【解析】join/join in/take part in(1) join=be a member of参加,指加入某种组织,并成为其中的一员。join the army / party入伍/党join the club加入俱乐部◆join in后接活动名称◆join sb.加入到某个人群之中(2) take part in参加,指加入群