Exercise 5. Bài tập chuyển đổi thì hiện tại hoàn thành sang quá khứ đơn
1. She started to live in Hanoi 2 years ago. (for)
2. He began to study English when he was young. (since)
3. I have never eaten this kind of food before. (This is)
4. This is the best novel I have ever read. (before)
