She was studying at Nanjing University______I met her.横线处用the last time 还是last time?

请教各位英语专业高手：在这个句子中：She was studying at Nanjing University______I met her.为什么横线处只能用the last time 而不能选last time?还有它们的区别又是什么？谢谢

She was impatient.She________ she was with child she was his mother. she was no longer the woman ___ she was HOW SAD SHE WAS 是什么意思 She was married next month she was more __than frightened 求朴振英的she was pretty although she was a beautiful woman,there was Where so ever she was,there was Eden?