1. How long have you been working...
2. They used to go swimming in the afternoon
3. He wishes that he could be a interpreter
4. If she had been careful, she would have lost his money
5. She is too old to have more children
6. Unless she studies hardly, she will fail the exam
7. Ian were given a story by her brother for her Birthday
8. It is a 24 hours flight
Nếu sai thì mình xin lỗi vì mình mới học lớp 8 mà đây là tiếng anh lớp 9