ANSWERS
1. c) The house was built by them last year.
2. a) The lesson will be explained by the teacher tomorrow.
3. a) A novel is being written by him.
4. c) A delicious meal has been cooked for us by the chef.
5. a) You will be shown the way by her.
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6. b) All the tickets have already been sold by them.
7. a) A new product is being launched by the company next week.
8. a) The assignment had been completed by the students before the deadline.
9. a) A new bridge is being constructed by them.
10. a) The winner will be announced by the director tomorrow.