Change the third form into the first form:
1) broken
2)rung
3)begun

1.a garbage is not only ugly, bute dangerous because it causes an air pollution.

2. cars are an important part of a life for most people. but cars also cause a pollution and release fume.

3. in canada people don't realise that they throw out 10,000 tons of a waste.

4. over 14 billion pounds of a waste per year is throw out to sea and it kills millions of sea animals.

5. if we want to breathe  a healthy air we have to think about what we do.

6. because of our lack of a knowledge there is now a huge hole over an antractic.

7.a water is a vital element of a life.

this girl i know from first grade. now she is my best friend, her name is liana. february eighth she turns 16 years old. for his age liana is quite high. it is rarely a bad mood, so the face can be seen most radiant smile, what a sad, wistful look. sometimes she gets angry, and then become more noticeable freckles. if satisfied with liana, her expressive eyes sparkle, attracting people's attention. his black hair is cut by the "square". she always collect them in a ponytail, do not like to walk with her hair, thinking that she is not talking. sometimes we quarrel, and liana's angry, but quickly put up as if nothing had happened.when liana writes something or decides she concentrated form. it is hard man. solving the example, all will be well to paint, but if something does not work, then will decide again and again until it finds the correct answer. in general, liana is a very interesting person. she will be able to amuse anyone. listening to the radio, she will sing, that already looks pretty funny. she never refused help to anyone who requests it. especially not deny the teacher's request. it can rely on and be sure that if she trusted with a secret she would never tell nobody, no matter what happens.