用there be句型和一般过去时的时态写一篇英语作文,题目为《我最难忘的一天》

an unforgettable day
Last Sunday my father took me to my grandparents' ,who live in the countryside.The town is small but it has a history of more than one thousand years.There are many green mountains surrounding the town and there are many trees everywhere .There are many houses built of wood but they are protected well so they are still in good condition.There I learned much knowledge that I can't learn in the textbooks.I will never forget that day.请用there was或there were