阅读下面短文，掌握其大意，然后从36—55各题所给的四个选项(A、B、C和D)中，选出最佳选项。
Recently I paid a visit to Harvard University, where there are top class scientists and professors and the best academic system in the world.
I was pretty 36 when I first stepped onto the campus. Well, it's not even really a campus. It's 37 like a district in a small town.
Harvard's main buildings are from the 18th century, They look very old and 38 . You might 39 say they're a little shabby. They don't fit the modern 40 of university at all. The buildings are surrounded by 41 and trees, so I felt as if I had walked into a medieval (connected with the Mid-Ages) castle. But when I looked across the street, 42 shops and in-fashion students made me feel like I was in the 21st century 43 . It creates a strong contrast (对比) and brings a special 44 to the school.
