Плиз, помогите. Это срочно! Даю 65 баллов! Ex 3 and 4!

3)idea

help

about

think

don't

work

thing

could

4)так и не сообразила, письмо необходимо писать или предложения, сделаю 2-ое

Announcements should be placed to attract volunteers who would work on streets.

This and similar advertisements should be removed and new advertisements should be always checked on being true.

Local farm should be checked too, maybe animal protection organizations should be involved.

The school canteen is closing although it is quite important and convenient. All the students should be asked about their opinion and if the main part prefer the canteen to stay open then everyone should deal with the problem. For example, students can make a petition for the school administration.