B　解析：代词指代题。根据第三段第四、五句"When in Italy, the most common toast is 'cin cin'， which has its origins in China. However, do not use this as a toast in Japan．"可知，意大利常见的祝酒词是"cin cin"，起源于中国；然而在日本，不要把这个当作祝酒词。结合该句"It is what could get you kicked out of a bar or possibly the entire country．"可知，这种起源于中国的祝酒词可能让你被赶出酒吧；据此可知，It指代源于中国的祝酒词，故B项正确。

　　3．What can we learn about Ireland from the text?

　　A．It is famous for food.

　　B．Its language is simple.

　　C．It makes perfect wine.

　　D．It is well worth visiting.

　　D　解析：推理判断题。根据尾段第二句"It's the friendliest place, and one of the funniest on the planet, and the pubs are full of stories, where locals and visitors gather to lift a glass of Guinness．"可知，爱尔兰是最友好的地方，也是世界上最有趣的地方之一，酒吧里充满了故事，在那里当地人和游客聚在一起举杯畅饮。据此可以判断，爱尔兰值得一游，故D项正确。

　　4．What's the main purpose of the text?

　　A．To introduce the world­famous wine.

　　B．To show how to make friends in bars.

　　C．To give suggestions on drinking regionally.

　　D．To recommend some famous travel destinations.

　　C　解析：写作意图题。通读全文可知，本文第一段尾句"To help you have fun, we've rounded up how to say 'Cheers！' around the world．"为文章的主题句，结合全文内容可知，本文主要介绍了在不同国家和地区说"干杯"的方式；据此可以判断，本文旨在介绍在不同国家和地区如何说"干杯"，故C项正确。

　　B

(2019·长春监测二)Next time you go shopping, keep in mind that there may be hidden cameras analyzing your habits. According to a 2015 survey of 150 managers from Computer Services Corporation, a quarter of British shops use facial recognition software to collect data on shopper behavior.