how to start a idiomatic self introduction?

analyse sentence wherever it went, it left behind it a trail of dead deer and small animals like rabbits. whether this sentence can become wherever it went, it left a trail of dead deer and small animals like rabbits behind it. why?

How much can surroundings influence us? I have a pessimistic thinking.What makes us?I think they are gene and surroundings,instead of the beautiful wishes in our minds.These two factors are so strong that I feel weak to withstand it.The influence of gene is crucial and fateful,because it decides our looks,our figures,our interests,our talents,our natures,our characters,etc.All of these have made most of us.They are fixed,we can’t change it. Compared to gene,surroundings are changeable.Although they are imperceptible to us and most people never take note of it ,we still can think out what it influences us in some sort.I can’t feel the influence of gene,but I can clearly feel the influence of surroundings.Most greats are born in nobles,like artists,writers,dancers....,as I know,there are Russell and Leo Tolstoy.Growing in warm family and with good education,they will develop good habits,abundant knowledge and improved personalities.In rich family,parents normally let their children learn music,painting and dancing...They have good conditions to develop their talents.Besides,children in wealth family normally are more confident and optimistic than other children. Surroundings are decided by people surrounding us:our family,our friends,our classmates,our colleagues.Their behaviors influences ours imperceptibly.If your mother likes lying,you may likes lying.If your dad likes watching football game,you may like it,too.If your parents are polite,you may behave properly in public.If your friends are all genuine,you may get genuine gradually.If your friends are all potty about a new video game,you may can’t help to have a try on it.If you are in top class and classmates around you all talk about like,It’s pity,I only got three full marks,your grades can’t be too bad.If you are in slow-learning class and classmates around you all talk about like,Thanks God my English passed!,you may satisfy with your ordinary marks.If your colleagues all are nice people,you may be more sincere and unclouded. The influence of surroundings are in everywhere,sometimes we want to avoid it,but we had already been formed unknowingly.

caprice about history Why do we learn history?To answer this question,we should figure out what is history.In my opinion,history is the all of the past.It’s the experience we human have got through.So we learn history to learn our past.But why do we learn our past? Learning our past helps us to realize our nation furtherly.It strengthens our belief and confidence with our nation.But what does it bring us?There always were conflicts between nations,so distinguishing differences is to amplifying conflicts in some way.Especially there are some countries emphasize themselves overly in their history textbooks.Learning our past helps us to know what we have done wrong in the past,reminding us do not repeat mistakes.It also teaches us precious experiences about how to change our society better.But it won’t tell us directly,so we need think thorough.