—Would you mind us in the game?—Not at all.A.joiningB.join in C.joining in

问题补充：

—Would you mind us in the game?

—Not at all.

A.joiningB.join in C.joining in

答案：

解析：join是加入的意思，后常接“某组织、团体、俱乐部等” ；join in是参加的意思，常用于:join sb in +活动名称。根据下文可知选A。