根据首字母及汉语提示，完成下列单词的拼写，使句意明确，语言通顺。
When I work for a long time, I will get b_________(厌倦).
Bob works hard. He t_________ (努力) to be a good student.
We s__________ (应该) eat some fruit and vegetables. They are good for our health.
He wants to learn Chinese c___________ (文化).
Eighty p___________ (百分之)of the students walk to school every day in our school.