1. I have already washed the floor.
2. He has written two books this year.
3. We have just begun our lesson.
4. He has already introduced us.
5. She has just answered the question.
6. I have sent the letter today.
7. She has already come.
8. The taxi has just arrived.
9. I have just broken my pencil.
10. I have already read this book.
Объяснение:
