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Exercise 1.
Open the brackets.
1. The lecture (to be over) at 5 and the last student (to leave) the hall. 2. They expect us at seven. She (to write) a letter by then. 3. By the time you get this letter everything (to be decided). 4. By the end of the lesson we (to repeat) words and expressions for 10 minutes. 5. By the time you (to come) out we (to travel) over Italy for a week. 6. When you (to return) they either (to lose) or (to win) the game already. 7. When she (to arrive) most of the guests (to leave) town and we (to get ready) to leave. 8. By the time you (to be through) I (to book) the tickets and (to wait) for you at the office. 9. When the bell (to go) some of the children (to hand) in al ready their papers, some (to look) through the completed work and only one or two (to write) still. 10. When they (to get) there people (to stand) in groups talking and laughing and only my father (to go in) to look for his seat. 11. When you (to reach) town the meeting (to be over). 12. If you (to bring) me that article in time I (to give) it to my typist and she (to type) it by 5 o'clock before the beginning of your lesson. 13. Those workers (to build) many new houses next year. 14. Those workers (to build) many new houses by the end of the year. 15. These workers still (to build) this splendid new theatre when the construction of the school (to come) to an end. 16.I probably (to see) him at the theatre tomorrow. 17. What you (to do) by five when they (to come)?

1.was over...left,2.will have written,3.will be decided,4.will have repeated,5.come out ...will have travelled...6.return ... will have lost or will have won...,7.arrived..had left  ...had got ready.8