题目内容：
根据材料，回答题。
I'll Be Bach
Composer David Cope is the inventor of a computer program that writes original works of classical music. It took Cope 30 years to develop the software. Now most people can't _____(51)the difference between music by the famous German composer J. S. Bach (1685-1750) and the Bach-like compositions from Cope's computer.It all started in 1980 in the United States, when Cope was trying to write an opera. He was having _____(52)thinking of new melodies, so he wrote a computer program to create the melodies. At first this music was not_____(53)to listen to. What did Cope do? He began to rethink how human beings compose music. He realized that composers, brains_____(54)like big data bases. First, they take in all the music that they have ever heard. Then they take_____(55)the music that they dislike. Finally, they make new music from what is_____(56). According to Cope, only the great composers are able to create the database accurately, remember it, and form new musical patterns from it.
Cope built a_____(57)database of existing music. He began with hundreds of works by Bach. The software analyzed the data a_____(58)it down into smaller pieces and looked for patterns. It then combined the_____(59)into new patterns. Before long, the program could compose short Bach-like works. They weren't good, but it was a start.
Cope knew he had more work to do-he had a whole opera to write. He continued to improve the software. Soon it could_____(60)more complex music. He also added many other composers, including his own work to the database.
A few years later, Cope's computer program, called "Emmy", was ready to help him with his opera. The_____(61)required a lot of collaboration between the composer and Emmy. Cope listened to the computer's musical ideas and used the_____(62)that he liked. With Emmy, the opera took only two weeks to finish. It was called Cradle Falling, and it was a great_____(63)! Cope received some of the best reviews of his career, but no one knew exactly_____(64)he had composed the work.
Since that first opera, Emmy has written thousands of compositions. Cope still gives Emmy feedback on what he likes and doesn't like of her music, _____(65)she is doing most of the hard work of composing these days!
_____ A．Make
B．tell
C．Take
D．understand
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