4. Find the mistakes and write the correct sentences. 1. The contract was typed and you can read it.2. The letter is not posted yet.3. A great number of new houses has been built in our district every year.4. The machines are delivered to me next month.5. He has been warmly thanked for the help yesterday.6. Has the contract been checked by the time the meeting began.7. She is told the news when he returned home.8. They had been given detailed instructions and had been told to fulfill them this month.9. He was offered new books when I entered the shop.10.I am offered a ticket to this performance but I refused.11. We are told that the factory was being restored.12. If I will be offered to see this film I will agree with great pleasure.13. We were told that the plant is closed.14. This play is performed now.15. We were laughed at when we enter the hall...16. The time of shipment is already agreed upon.17. Is this letter given to him yet?18. This work is being written next year.​