根据句意和汉语提示，用正确的单词填空。
During her__________ (一生) she had experienced two world wars.
We all __________(坚持认为) that we should not rest until we finish the work.
Tony said he did something __________ (愚蠢的) when he was very young.
We should __________(呼吸) in the fresh air every day.
His third film__________ (标志) a great achievement in Hong Kong films.