Change into causative
1. John will ask a famous band to play music at his party
2. We can invite a brigade to install the alarm system
3. William is going to ask his friends to arrange a party .

Change into the passive.
1. He has finished all the tasks
2. Fred has to meet the friends
3. I used to do a lot
4. He likes people giving him advice
5. Do you plant trees every spring?
6. I didn't translate the text
7. They have been building the house for three years