=>
15/
1. She has lived in Hanoi for 2 years.
2. He has studied English since he was young.
3. This is the first time I have eaten this kind of food.
4. She is the most beautiful girl I have ever met.
5. I have never read such a good novel before.

1. She has lived in Hanoi for 2 years.( 2 năm trước cô ấy bắt đầu sống ở Hà Nội nên viết lại là cô ấy đã sống ở Hà Nội được 2 năm, thì hiện tại hoàn thành)

2. He has studied English since he was young.

3. This is the first time I have eaten this kind of food.

4. She is the most beautiful girl I have ever met.

5. I have never read such a good novel before.