根据题中空格后的中文提示、英语释义或句意，写出句中所缺的单词。Everyone arrived on time _________ Tom because his mother was ill in hospital.
At the beginning, no one___________ (get to know and understand sth.) the harmfulness of cutting down trees and forests.
The old man was very sad because he found his cat _____(lose one’s life) there days ago.
His father has travelled to many places, such as _____(亚洲), Europe, America and so on.
Sandy was born in a big family, so she has many r_________.