Change the active to the passive by supplying the correct form

Change the active to the passive by supplying the correct form of the verb to be 1. Tom is preparing the homework. The homework _____ prepared by Tom now. 2. Tom has prepared the homework. The homework _____ prepared by Tom. 3. Tom prepared the homework. The homework _____ prepared by Tom. 4. Tom was preparing the homework. The homework _____ prepared by Tom. 5. Tom had prepared the homework. The homework _____ prepared by Tom. 6. Tom will prepare the homework. The homework _____ prepared by Tom. 7. Tom will have prepared the homework. The homework _____ prepared by Tom.