A、You just keep silent. B、You can complain directly. C、You can tell him directly. D、You can leave as you like. C信息明示题。文章中明确地指出，一

(29)People from different cultures sometimes do things that make each other uncomfortable, sometimes without realizing it. Most Americans have never been out of the country and have very little experience with foreigners. But they are usually spontaneous, friendly and open, and enjoy meeting new people, having guests and bringing people together formally or informally. They tend to use first names in most situations and speak freely about themselves. (30) So if your American hosts do something that makes you uncomfortable, try to let them know how you feel. Most people will appreciate your honesty and try not to make you uncomfortable again. And you’ll learn something about another culture!
(29) Many travelers find it easier to meet people in the US than in other countries. They may just come up and introduce themselves or even invite you over before they really know you.
Sometimes Americans are said to be superficially friendly. Perhaps it seems so, but they are probably just having a good time. Just like anywhere else, it takes time to become real friends with people in the US.
(31)If and when you stay with American friends, they will probably enjoy introducing you to their friends and family, and if they seem proud to know you, it’s probably because they are. Relax and enjoy it!