VIII-PASSIVE: 1. A lot of people use cell phones .=>> Cell phones 2. Nga does her homework every day.-> Her homework...... 3. Mrs Mai taught students 6c English.=> Students 6c 4. He gave her some flowers yesterday .=> 5.They have finished their homework.=> Their homework 6.He has lost his keys for 2 days => His keys ........ 7.. They have done their homework.=> Theitr homework.. 8.Do you clean the house evey day?.>........the house 9. Did you buy this dictionary two weeks ago?=>...... ..this dictionary. 10.Noone helped him with homework .=> He 11. Nam doesn't clean the house everyday .=> The house.. 12. He didn't do housewrk yesterday .=> Housework..