Sometimes I think how grateful I would be today if I had learned more back then about what really matters.

Sometimes I think how grateful I would be today if I had learned more back then about what really matters.

A.I would be happy now if I had learned more about great historic events.

B.I would be satisfied today if I had learned more about things really important.

C.Since I have learned how to deal with difficulties, I feel content with my education.

D.Since I have learned more than other students, I feel thankful to my school teachers.

正确答案是B