[解析]
(1)推理判断题。根据文章第二段The most obvious characteristic of the majority of Americans is that they smile a lot.It does not matter whether they have a strong reason to smile sometimes simply because they have to.Europeans,on the contrary,smile mostly when they are in a good mood,or feel amused;(大多数美国人最明显的特点是他们经常微笑。他们是否有足够的理由微笑并不重要,有时只是因为他们不得不笑。相反,欧洲人只在心情好或觉得有趣时才会微笑)可知,本段讲解了美国人、欧洲人对于微笑的不同解读,据此可以推知,微笑与西方文化有关。故选A项。
(2)细节理解题。根据文章第三段Europeans are more straightforward,even with unfamiliar people.A European friend will almost always voice his opinion on different occasions,and will not hesitate to remind you that you need to lose some weight or take a shower.(欧洲人更直率,即使是面对不熟悉的人。一个欧洲朋友几乎总是会在不同的场合表达他的意见,并且会毫不犹豫地提醒你,你需要减肥或洗个澡)可知,欧洲人通常坦诚地表达自己。故选D项。
(3)代词指代题。根据划线词上文Americans are extremely politically correct which,in most cases,is indeed a secure and beneficial practice,(美国人在政治上非常正确,在大多数情况下,这确实是一种安全和有益的做法)可知,it指代上文提到的美国人政治正确这件事。A.Being straightforward.直截了当;B.Being politically correct.政治正确;C.Accepting everything new.接受一切新事物;D.Raising unbelievable conservatives.引发难以置信的保守主义。故选B项。
(4)推理判断题。根据文章第二段The most obvious characteristic of the majority of Americans is that they smile a lot.It does not matter whether they have a strong reason to smile sometimes simply because they have to.Europeans,on the contrary,smile mostly when they are in a good mood,or feel amused;(大多数美国人最明显的特点是他们经常微笑。他们是否有足够的理由微笑并不重要,有时只是因为他们不得不笑。相反,欧洲人只在心情好或觉得有趣时才会微笑)及第三段Americans are extremely communicative;small talks and chats are common.Europeans talk mostly when there is something to say,and rarely enter communication just for the purpose of talking to other people.(美国人非常健谈;闲聊是很常见的。欧洲人大多在有话要说的时候才说话,很少为了和别人说话而进行交流)及全文可知,作者通过分析美国人和欧洲人对微笑的不同理解以及通常在交际中的不同表现来展开文章。由此推知,作者是通过作比较来展开文章的。故选B项。