Changing the following sentences into passive voice

 
                               FURTHER PRACTICE
Changing the following sentences into passive voice.
1.  I open the window.
—> The window....................................
 
2.  She is writing a letter.
—> A letter..........................................
 
3.  They buy food and drink
—> Food and drink..................................
 
4.  The teacher teaches English.
 
—> English................................
 
5. They were building a new hospital.
—> A new hospital..........................
 
6. They planted many trees.
—> Many trees........................
 
7.  Mother grows rose trees in the garden.
—> Rose trees.....................................
 
8.  The farmers are going to cut rice in the field.
—> Rice........................................

9. Hoa's aunt has put the bag on the table. 
—> The bag......................................

10. She made this shirt for me. 
—> This shirt..................................