Нужно поставить глаголы в V3

Environmental problems have become one of the most urgent problems of modern society. More and more people suffer from air and water pollution. Nature also suffers from land and nuclear pollution. The reasons for such environmental problems are numerous. Among them increasing number of cars in the streets, factory waste, millions of cut down trees, destroyed habitats of animals, contaminated rivers and seas. All these problems mainly arise due to human careless activities and gradually destroy our planet. If we look closely, we’ll notice that not only one city is under danger, but the majority of world population. Fortunately, there are many ways to suspend these problems. If everybody starts caring about the planet we live on, many environmental problems can be solved. For example, if we start recycling paper and cardboard, we can save lots of trees. If we start using public transport more than private cars, we can have less air pollution. Local governments can also help to prevent some problems, if they forbid logging companies to destroy the forests, or stop factories from polluting water. The most important thing is, of course, to start acting immediately, otherwise we might have to face many global disasters.

1. we are going to write ..a. test. ..the. test is rather difficult
2. they have got .a.. cat and..a dog at home. .the.cat always scratches ..the. dog
3. i saw ..a. car...the car stopped outside our house.
4 there is ..a. new student in our class . ..the. student is from Italy.
5. you should take ...a knife to open the tin. ..the. knife is in box.
6. mary has got .a.. good job, She devotes much time to ..the. job,
7. Her son got..a bad mark at school yesterday, but ..the. mark didn't upset him
8. They gave ..a. party last week. everybody enjoyed ..the. party
9. he met ..a. girl at the disco, .the. girl was ..a. nice dancer.
10. my brother bought ..a new flat. ..the. flat is small but quite comfortable.
11. she saw ..a. nice dress in the shop, but .the.. dress was to expensive for her to buy it
12. i have .a.. CD player, but .the.. CD player doesn't work.