Task 1.
1) Nowadays people have got many invoromental problems.
2) A lot of tourists attracts the Grand Canyon every year.
3) Since August Aunt Polly has canned a lot of fruits and vegetables.
4) Kate was born in Sydney in 1997.
Task 2.
1) Laure often comes home late.
2) Sometimes ha fell unhappy.
3) Isn't still raining?
4) Are they all so independent?
5) We have never seen dodoes.
Task 3.
1) b
2) a
3) b
4) b
5) b
6) a
Task 4.
1) No one can affect on his decision.
2) "Can you keep an eye on my flowers? I'm going to Moscow on the holidays".
3) I want you to stay with me this summer.
4) Professor Gordon said, that rivers' polution become dangerous.
5) Tom want to be discoverer of new lands.