Put in a lot / a lot of / much / many.George knows about economics.

George knows a lot about economics.

a lot of

Джордж много знает об экономике

Family - it's the best thing a person. no amount of money or career does not give us something that can give a family is tenderness, love, reliability, poderzhka. friends of course also important but it is certainly in the first place must be a family. because not everyone can wear the proud title of "other"  .  перевод  -  семья - это самое лучшее что есть у человека . никакие деньги или карьера не дадут нам то что может дать семья это нежность, любовь, надежность, подержка . друзья конечно тоже важен но всётаки на первом месте должна стоять семья . потому что не все могут носить гордое звание "друг"  . 

dear \name\,

thanks for your letter. it was great to hear from you.

in your letter you ask me about education and exams. i think education has a huge role in our lives. it gives us new knowledge and determines the future path in life. i am in the 9th grade and i already know what to dedicate my life to — i want to be a pilot. this is a difficult profession, but it doesn't scare me. this profession requires a good knowledge of physics and mathematics. guess what i will take on exams? of course physics!

well, i'd better go now as i have to do my homework. hope to hear from you soon.

all the best,

\your name\