英语语法填空有些不懂.求详解1.Inthe200meterscompetitionhesetanewworldrecordof21.30secondsinhisheaton29Auaust,___but__wasdefeatedinthefinalbyAlanOliveiraofBrazilandtooksilver.(为什么这里用but,不用whic

　　英语语法填空有些不懂.求详解

　　1.Inthe200meterscompetitionhesetanewworldrecordof21.30secondsinhisheaton29Auaust,___but__wasdefeatedinthefinalbyAlanOliveiraofBrazilandtooksilver.(为什么这里用but,不用which?求详解)

　　2.Heraninthesecondsemi-final,__where__hefinshedeightthwithatimeof46.54seconds.(为什么这里用where,不用that?求详解)

　　3.Theybothfelltotheground___unconscious____(conscious)(为什么这里不用unconsciously,而用unconscious,不应该副词修饰动词吗?求详解)