Put the verbs in brackets into the correct passive form.
1. A: How is Earth Day going at the school?
B: Great! Some recycling bins are being installed (install) by students at the moment.
2. A: A speech ….. (make) in parliament about pollution yesterday.
B: That's great. Something ….. (should/do) about this problem.
3. A: Is this the bin where plastic bottles (put)?
B: Yes, it ……. (collect) tomorrow.
4. A: Have you seen the new plants in the park?
B: Not yet. They…… (plant) when I passed the park last Monday.

The air must be kept clean.
Water must be used efficiently.
The garbage must be put in special containers.
Cars should not be parked near houses.
Trees must not be cut in big numbers in forests.

И без модальных глаголов

The air is kept clean and we can breathe.
The garbage is put in special containers and we can remain healthy.
Cars are not parked near our houses and we can have cleaner air.
Trees are not cut in big numbers and we have enough air to breathe,
Water is used efficiently and we have enough water to drink.

Probably the boys will say that their favorite subject is history, or physical education. Girls will say that labour. As for my favorite subject is Russian language. She's extraordinary, sweet, wonderful. No wonder our language, ranks first worldwide from euphony and beauty. In General language is a miracle that someone created. Without it we would not be able to communicate, Express their thoughts and feelings. Love of language is attached at school. We are taught to respect it, to understand...
This is why I love this subject.