同位语中one the one

Question

两个句子：
1.I went shopping for the perfect dress,__would make me look younger.
2.We sat side by side ,watching the sun going down behind the old station across the busy street,__i was never allowed to cross unless accompanied.
请作答并给出合理详细解释。已知第一题用The one ，第二个用One

Answer 1

one 用作替代词表泛指；the one是特指。很明显第一个句子表示特指，里面的“perfect”显示出了强烈的情感，特指就是那条裙子，而不是那种裙子。而第二句属于泛指，只要这类的马路都不想自己 cross

Answer 2

the one:特指上文中提过的特定事物，第一题中，特指前半句提到的“the perfect dress”
one 泛指任何一个符合条件的同类事物~~第二题中，泛指“任何一个拥挤的街道”
所以，答案为：1~~the one 2~~one