1. She has been ill for ...2. The lesson will have begun by ...3. Has this letter been wrtitten by you yet? - Yes, I have sent ...4. He told me he had already finished ...5. ... the swimming pool will have been built ...6. Everything had been done before ...7. Our son has entered ...8. The article will have been translated by the end ...9. ... after they had worked ...10. How many phone calls have you made today? - I had made twenty calls by 3 p.m.11. Two new engineers have just been introduced to ...12. ... that the new student was being much spoken about.