题目内容：
Cultural Differences People from different cultures sometimes do things that make each other uncomfortable．sometimes without realizing it. Most Americans______1 out of the country and have very______2 experience with foreigners. But they are usually spontaneous．friendly and open．and enjoy______3 new people．having guests and bringing people together formally or informally．They tend to use first names______4 most situations and speak freely about themselves. So if your American hosts do something that______5 you uncomfortable．try to let them know how you feel. Most people will______6 your honesty and try not to make you uncomfortable again. And you'll all______7 something about another culture!Many travelers find______8 easier to meet people in the U. S. than in other countries. They may just come up and introduce themselves or even invite you over______9 they really know you. Sometimes Americans are said to be______10 . Perhaps it seems so．but they are probably just______11 a good time. Just like anywhere else．it takes time to become real friends______12 people in the U.S..
If and when you______13 American friends．they will probably______14 introducing you to their friends and family．and if they seem proud______15 you．it's probably because they are. Relax and enjoy it.请选择（1）处的最佳答案． A．have never been
B．have been never
C．has never been
D．has been never
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