听力原文：M: So you' re visiting San Francisco？W: Yes, I just got here yesterday. And you？M

听力原文：M: So you' re visiting San Francisco？

W: Yes, I just got here yesterday. And you？

M: I' m a native.

W: Oh, really？ Everyone else I' ve met so far has been a tourist like us. I was beginning to think that there were no natives.

M: Well. San Francisco has a lot of different ethnic groups so you might think you' re seeing a lot of foreigners. But actually, the city has a population of about 700 000.

W: What are the different ethnic groups？

M: Well, after whites, the largest one is blacks.

W: I thought it was Chinese.

M: It's true that San Francisco has the largest Chinese community outside of Asia. But there are many more blacks here than Chinese.

W: That' s interesting. Don' t most of the Chinese people live in China-town？

M: Well, no, they live all over the city, but China-town is definitely the center of Chinese culture here. That' s where you' ll find the best Chinese restaurants, bookstores, art, theaters, things like that.

W: What about the Japanese？ Doesn' t San Francisco have a large Japanese population too？

M: No, actually there are only about 12 000 Japanese people here, but we do have an area called "Japan-town" that has Japanese restaurants and bookstores.

W: You seem to know a lot about this city.

M: Well, most San Franciscans think their city is pretty special. We like to tall about it. Besides, I teach ethnic history at the university here.

W: No wonder you know so much!

What is the largest ethnic group in San Francisco？

A．The blacks.

B．The whites.

C．The Chinese.

D．The Japanese.