1. The lesson has just been learnt by the student.
2. The animals have been fed for hours.
3. English has been studied since 1996.
4. All the arrangements have been made by her.
5. The laboratory has been changed the windows.
6. The shop has been opened by Mary since 1996.
Lần sau bạn viết rõ chữ r với chữ n nha ^-^