单选题 The law is a great many of rules, showing when and how far a man is likely to be punished, or to be made to hand over money or property to his neighbors, and so forth. These rules are contained (包含) in books. A lawyer learns them mainly by reading books.
He begins by doing little else than read, and after he has prepared himself by, say, three years" study to practice, still, all his lifelong and almost every day, he will be looking into books to read a little more than he already knows about some new questions which he has to answer.
The power to use books, then, is a talent (天资) which he would be (将要成为的) lawyer ought to have. He ought to be very flexible (灵活的) and fine to make it easy for him to collect ideas from printed words. He ought to be ready in finding what a book contains, and something of an instinct (本能) for where to look for what he wants.
But although this is the power of which he will first feel the need, it is not the most important. A lawyer does not study law to recite; he studies it to use it and act upon the rules, which he has learned in real life. His business is to try cases in court and to advise men what to do in order to keep out or get out of trouble. He studies his books in order to advise and to try his eases in the right way.

单选题 The first thing a law student has to do is to ______.

单选题 After three years of reading, ______.

单选题 According to this passage, a would-be lawyer ought to have the ability to ______.

单选题 The main business of a lawyer is to ______.