有關句子既tense 問題

I went to ABC School to do my homework yesterday. I arrived at the school at
9:30am. The school was composed of two tall buildings. There were five floors in the school. Then I did my homework in Room 206.

小弟想問問大家以上段野既tenses 岩唔岩。The school was composed of
two tall buildings. lee 句用past tense 得岩得，間學校宜家由兩座高樓所組成。