I have often felt that I lived in a beautiful world and a nice society, and that is true. I have often felt that I live in a beautiful world and a nice society, and that is true.

if you still feel this way occasionally, i think the correction reads better.

It only takes decades for our society to make such biga lot of progress. It only takes decades for our society to make a lot of progress.

a lot of / so much sounds better to me

Even in the mid-1980s, on the syeason of ourr we graduationed, one of my classmates said to me: “after I goet a job, I wouldill buy a basket of eggs, and I eat it atthem anytime when I wanted.." That was his biggest ideal at that time. Even in the mid-1980s, the year we graduated, one of my classmates said to me: “after I get a job, I will buy a basket of eggs, and eat them anytime I want." That was his biggest idea at that time.

Also, I have never thought that I would be able to live a life like the one I am living today’s. Also, I have never thought that I would be able to live a life like the one I am living today.

just for clarity

I often work hard and study hard so that I willcan live up to theis great era. I often work hard and study hard so that I can live up to this great era.