Помогите,нужно предложения перевести на Passive Voicec
1. Our friends usually gather mushrooms in September

The floor isn't sweept by David every day. An exciting film is watched by them every night. Butter is made from milk

Swept*

They teach three foreign languages at this school

We receive this letter after his departure

Three foreign languages are taught at this school. This letter is received after his departure.