The polls are open for a second day in southern Sudan.为什么不是T

a second day 怎么翻译.第二天?例句：The polls are open for a second day Don`t make the same mistake for the second time in a day.这里的 汉译Girls in southern Sudan are more likely to die in childbir the second day in a week the second day in a week同义词 We are open during the day and in the evening seven days a w t( )is the second day in a week在括号里填上合适的词 Mother's Day in on the second Sunday of May.It's a day to t＿ it's the best t() for sports in a day Monday is the second day of a week!这里为什么要加the?不是序数词做表语,the可省 in the second day 还是on the second day? the+second+day+in+a+week+is+tuesday是什么意思