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Recently I've read about a bird called the passenger
pigeon, or wild pigeon,
it lived in North America
a century ago. It was a beautiful, swift and graceful bird.
There were thousands, even millions of them.
I was surprised to find out that today there is not even
one left. All living passenger pigeons disappeared from
the earth entirely. The passenger pigeon became extinct.
It happened for many reasons. The main one is the
change in the pigeons' natural habitat, in the environment.
These birds needed large forests, but farmers needed land,
so they cut down forests. No forests no food for the birds.
Second, many pigeons were shot for sport and because they
were good to eat. At that time, there were no hunting laws
to protect endangered species like there are now. Pigeons
were killed in huge numbers, and there were very few of
them left. There were not enough birds for the species to
survive.
The passenger pigeon is only one of the many plants
and animals that once lived on our planet and have become
extinct. Extinction has been going on since life began on
our planet. But today extinction is happening faster than
ever before.
I feel very concerned about this and wonder what can
be done to stop it?
Good-bye,
Tracy перевод нужен ​

Объяснение:

1. I know who your boss is. I have worked for him.

2. Look! Somebody has already broken the tree.

3. Mary has gone to Moscow, but she’ll be back next Monday at the latest.

4. Andy is in hospital now. He has had a bad crash.

5. Jane is crying. She has hurt her knee.

6. Я только наделаю ошибок

Упражнение 2.

He has finished training. She has scored twenty points in the match. We have watched all the Champions League matches this season. That's amazing! She has run fifteen kilometers this morning! She has bought some really nice rollerblades! Oh, no! I have lost my money! My mum has written shopping list. It's on the kitchen table. Dad, you have eaten my biscuit! I’m tired. I have watched three X-Files videos. Hurry up! They have started the film! Mary has studied hard this year, so she'll pass her exams. Oh no! She has dropped the plate! The garden is very green. It has rained a lot this month. These are my favourite trousers. I have had them for five years. Tom's my best friend. I have known him for three years. They have lived in Miami for two years. Jo has earache. He has had it since 7 o'clock. Brad has lived in Chicago since 1998.

He finished training.

She scored twenty points in the match.

We watched all the Champions League matches this season.

That's amazing! She ran  fifteen kilometers this morning!

She  bought  some really nice rollerblades!

Oh, no! I  lost my money!

My mum wrote shopping list. It's on the kitchen table.

Dad, you ate my biscuit!

I’m tired. I  watched three X-Files videos.              

Hurry up! They  starts the film!

Mary  studied hard this year, so she'll pass her exams.

Oh no! She  dropped the plate!

The garden is very green. It  rains a lot this month.

These are my favourite trousers. I  have them for five years.

Tom's my best friend. I know him for three years.

They live in Miami for two years.

Jo has earache. He has it since 7 o'clock.

Brad live in Chicago since 1998.