完形填空。阅读下面短文，掌握其大意，然后从21~40各题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题纸上将选项标号涂黑。
How far would you walk to learn about something that interested you? When he was young, Jacob Lawrence often walked more than sixty 1 from his home in the Harlem section of New York City to the Metropolitan Museum of Art．Jacob wanted to be a（n） 2 ，and he believed that studying the famous paintings 3 in that museum would help him．
It was 1930,when many people were out of work, money was 4 and people suffered a lot．Still the streets were 5 with energy and color．As he walked through Harlem, Jacob looked hard at the people, the churches, and barbershops and so on．He 6 those images in his mind, along with the images of paintings he saw in the 7 ．
