英选择一道 paper money was in use in china whenPaper money was in use in China when Marco Polo visited the country in the 13th century.不是说时间前面不加定冠词么?比如说 He was born on June 12,1999.他出生于1999年6月12日。
问题描述：
英选择一道 paper money was in use in china when
Paper money was in use in China when Marco Polo visited the country in the 13th century.
不是说时间前面不加定冠词么?
比如说 He was born on June 12,1999.他出生于1999年6月12日。
答
13th 是序数词，所以前面有定冠词 the
答
在季节、月份、节日、假日、日期、星期等表示时间的名词之前,不加冠词.
譬如说你举得这个例子,He was born on June 12,1999.
但是用在序数词前要加定冠词the,
in the 13th century.
13th是序数.