Monday is the second day of the week,这不是比较级,为什么要加the

Monday is the second day of the week,这不是比较级,为什么要加the 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 Monday is the second day of the week为什么用second 请翻译 Monday is the second day of a week . monday is the ---day of the week.A:twoB:second C:three D:thi The second day of the week is ( )in China.A.Monday B.Tuesday The ____ day of a week is Monday.A、first B、second C、third Monday is （ ） second day of a week.选择：A.the B.on C.for 单项选择.1:The second day of week is( )A:Monday.B:Tuesday.C:sund In English ,Monday is the _____ day of the week. It is Monday today,the s() day of the week. 5.Monday is'the ___(two) day of the week