1.They gave me two tickets for the concert.(2 possible passive sentences)
I for the concert
Two tickets for the concert.

2.Do they grow a lot of coffee in the area?
a lot of coffee in the area?

3.They are going to pay us next week.
We next week.

4.They might select her for the national team.
She for the national team

5. They have just repaired the machine.
The machine .

6.They used to make money out of gold.
Money out of gold.

7.They are preparing breakfast.
Breakfast .

8.They didn't send me a letter
I a letter.