англичане! ! Put prepositions into each gap, if necessary

Question

Put prepositions into each gap, if necessary 
 
 I'm waiting ...the postman to arrive. 
 Look ...that picture. Isn't it beautiful! 
 He became interested ...mathematics when he was a school boy. 
 The boy learned at the gymnasium ...1802 ...1807. 
 I'm looking ...Mary. Is she here? 
 She works ...BP, a big petrol company. 
 If you have a problem, ask ...help. 
 Lobachevsky's ideas greatly influenced ...the development of mathematical sciences. 
 Did you know that Alan is married ...Barbara? 
 Can I speak ...you for a minute? 
 Your shirt is similar... mine. Where did you buy it? 
 I agree ...you about most things, but not politics.

Сергей Бондаренко · Accepted Answer

I'm waiting FOR the postman to arrive. 
Look AT that picture. Isn't it beautiful! 
He became interested IN mathematics when he was a school boy. 
The boy learned at the gymnasium FROM 1802 TILL(TO?) 1807. 
I'm looking FOR Mary. Is she here? 
She works FOR(IN?) BP, a big petrol company. 
If you have a problem, ask FOR help. 
Lobachevsky's ideas greatly influenced ON the development of mathematical sciences. 
Did you know that Alan is married TO Barbara? 
Can I speak WITH you for a minute? 
Your shirt is similar TO mine. Where did you buy it? 
I agree WITH you about most things, but not politics.

Сергей Сер · Answer

I'm waiting FOR the postman to arrive. 
 Look AT that picture. Isn't it beautiful! 
 He became interested IN mathematics when he was a school boy. 
 The boy learned at the gymnasium FROM1802 TILL1807. 
 I'm looking FOR Mary. Is she here? 
 She works AT BP, a big petrol company. 
 If you have a problem, ask FOR help. 
 Lobachevsky's ideas greatly influenced ON the development of mathematical sciences. 
 Did you know that Alan is married TO Barbara? 
 Can I speak WITH you for a minute? 
 Your shirt is similar TO mine. Where did you buy it? 
 I agree WITH you about most things, but not politics.

Виталий Юрьевич · Answer

for 
at 
in 
from... till... 
for 
in 
for 
by 
with 
with 
to 
with