People from different cultures sometimes do things that make each other uncomfortable, without meaning to or sometimes without even realizing it. Most Americans1never been out of the country and have very little 2 that with foreigners. But they are usually spontaneously to get children to help, friendly and open, and 3meeting new people, having guests and 4people together formally (正式地) or informally.
They tend to use first names in most 5 and speak freely about themselves. 6 if your American hosts do something that makes you 7, try to let them know how you feel. Most people will 8 your honesty and try not to make you uncomfortable again. And you'll learn something about another culture!
Many travelers find it 9 to meet people in the U.S. than in other countries. They may just 10 and introduce themselves or even invite you over before they really know you. Sometimes Americans are said to be 11 friendly. Perhaps it seems so, but they are probably just 12 a good time. Just like anywhere else, it takes 13 to become real friends with people in the U.S. If and when you stay with American friends, they will probably enjoy 14 you to their friends and family, and if they seem eager to know you, it is probably 15 they are. Relax and enjoy it!