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Ответ:

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1. Some trees have been planted by the gardener.

2. Some advice will be given to you by Doctor Brown.

3. The work was finished before lunchtime.

4. The crystal vase has been broken by someone.

5. Penicillin was discovered by Fleming.

6. The product will be advertised on television by them.

7. That fence is being repaired by someone.

8. Why the roof wasn`t fixed?

9. A huge hole in the steel door was cut by the burglars.

10. The roof of the building was damaged by a storm.

11. We are visited twice a week by my uncle.

Объяснение:

100% гарантии дать не могу, м.б. кто откорректирует, пассив не так хорошо в английском помню...