May I ________________ the game? ____ the Party/ League/ army/ a club Why not ________ playing basketball?

take part (in) 参加，参与（活动） join 加入(某党派、某组织或某社会团体) join in 参加，参与（活动） join sb. 和某人一起…… join sb in sth./doing sth. 和某人一起做……

take part in/join in

join

join us in