He was a professor. At the age of 90, he still (work) eight hours every day no matter what the weather was like. He also kept (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 (succeed).

    The other day, a university student walked out from his office with a lot of books. He said a little (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 (I)."

    Later, the professor knew the student said. He said with a smile, "This is the method I have learnt, a hard troublesome way. If that kid could put those books to good use, he might learn the answers his questions and could be a good lawyer in the future."

    This 90-year-old man was president of the Law College at Harvard University. He believed "all slopes are easy (go) down". And he often reminded his students about that.