BT1: Chuyển sang câu bị động

1.They will reopen the theater after reconstruction

->

2.People celebrate this day once a year

->

3.I have my friend paint the wall for me

->

4.Have you ever organised a volunteering project ?

->

5.They may earn more money if they have this cortificare

->

6.People are discussing about environmental problems in this lobby.

->

Mọi người giúp mình với mình cảm ơn ạ