Are they good people?
Is that man gives you some cookies?
Практически ошибок нет,если есть,только маленькие! во 2 предложении просто country! И еще в какос предложении есть тире ,но не должео быть! и еще The Capital of this country is London! А в целом все отлично и грамотно!
If I had money, I would buy a new car.
You will pass the exam if you study more
I would win the game If I trained hard
I would buy the house if it were cheap
If I am offered the job, I will take it.
1 was, 2got,3made,4had,5had,6went,7began,8? 9came,10had,11went, 12 halp,13listened, 14 watched, 15 saw, 16?,17played, 18?,19went