\textbf{(2017 US Math League, Priamry 5, Question \#33)}  $$A$$, $$B$$, $$C$$, $$D$$, $$E$$, $$F$$, and $$G$$ participated in a chess tournament. Each player must play each of his six opponents exactly once. So far, $$A$$ has played $$1$$ match. $$B$$ has played $$2$$ matches. $$C$$ has played $$3$$ matches. $$D$$ has played $$4$$ matches. $$E$$ has played $$5$$ matches and $$F$$ has played $$6$$ matches. How many matches has $$G$$ played at this point?（$\textasciitilde\textasciitilde\textasciitilde\textasciitilde\textasciitilde\textasciitilde$）  甲、乙、丙、丁、戊、己、庚一起参加象棋锦标赛，每一位选手必须要跟六个对手分别对赛一次．目前为止，甲比赛了一场，乙两场，丙三场，丁四场，戊五场，己六场，那么目前庚比赛了几场？（$\textasciitilde\textasciitilde\textasciitilde\textasciitilde\textasciitilde\textasciitilde$） 
选项为:A:$$1$$  B:$$3$$  C:$$5$$  D:$$7$$  请回答其中一个选项.