They are having their Young pioneer's Day.这里的 pioneer's用法对吗

They are having their Young pioneer's Day.这里的 pioneer's用法对吗 Young Pioneer Are you a Young Pioneer yourself national young pioneer committee的中文 All of the chinese student are Young Pioneer The Yong Pioneer are climbing the hill with their teachers? chinses young pioneer是什麽意思? the young pioneer是专有名词吗? The Young Pioneer made( )the old man . young pioneer是可数名词么 求详解 1 .The Young Pioneer water for the old man every day. 连词成句:of the chinese are all student young pioneer