9.Mixed doubles competitions,---------- a team consists of o

1。答案的确是选B,但是where引导的是定语从句,并非地点状语从句。2。翻译：混合双打比赛,即其中队伍由一位男选手和一位女选手组成,是只在四大满贯赛事中(澳网/温网/法网/美网)所举行的代表性项目。3。楼主记住定语从句的特点：关系代词(which)代替先行词(mixed doubles competitions),并在定语从句中充当一定的成分；关系副词(where)=介词(in)+关系代词(which)所以定语从句的完整句子是：where a team consists of one male player and one female player =in which a team consists of one male player and one female player =a team consists of one male player and one female player in which =a team consists of one male player and one female player in mixed doubles competitions