What problems has Steve been facing in Mexico? How has he coped with them?

b: then where have you been? (present perfect)

a: oh, nowhere. i wanted (past simple) to go to america two years ago,but now i don't want to go there.

b: why?

a: i understood (past simple) that my wish is impossible, so i abandoned(past simple) that idea. 

и 2-я

b: have you heard some interesting news? (present perfect)

a: no.

b: i heard (past simple) that brian flunked (past simple) his exam last week. 

a: why did (past simple)he flunk the exam?

b: he lost (past simple)his homework, so he didn't repeat a topic.(past simple)

-our organise wants to   protect the environment.

-we fight against water and air    pollute

-are you unhappy with the ecological situate  in your region?  

-send us some inform about it and we`ll try to help. 

i knew this person!

he rode a book

you do this exercise

местоимение "аny" употребляется в вопросительных, в отрицательных и в утвердительных предложениях с неисчисляемыми существительными со значением “всякий, любой, каждый”.

например,

are there any books on the table?

(лежат ли на столе какие-нибудь книги? )

there are not any books on the table(на столе нет никаких книг)

any student must do it(любой студент это может сделать)

many –много

местоимение "many" употребляется с исчисляемыми существительными

например,

i have many english books(у меня много книг)there are many patients waiting for the doctor(есть много пациентов, ждущих врача)