阅读下列短文，根据文章大意用所给单词的适当形式填空(未提供单词的，限填一词)，使文章意思完整、正确。 He was a professor. At the age of 90, he still {#blank#}1{#/blank#} (work) eight hours every day no matter what the weather was like. He also kept {#blank#}2{#/blank#} (walk) from his house to the office through two blocks. It would take him an hour, but he stuck to this habit because it gave him a sense of {#blank#}3{#/blank#} (succeed).
The other day, a university student walked out from his office with a lot of books. He said a little {#blank#}4{#/blank#} (angry) to others, "He always treats me this way. He might answer me just with 'yes' or 'no' to my questions. However, he always gives me lots of books and suggests I find the answers by {#blank#}5{#/blank#} (I)."
Later, the professor knew {#blank#}6{#/blank#} the student said. He said with a smile, "This is the method I have learnt, a hard {#blank#}7{#/blank#} troublesome way. If that kid could put those books to good use, he might learn the answers {#blank#}8{#/blank#} his questions and could be a good lawyer in the future."
This 90-year-old man was {#blank#}9{#/blank#} president of the Law College at Harvard University. He believed "all slopes are easy {#blank#}10{#/blank#} (go) down". And he often reminded his students about that.
