What's the main idea of the passage?

　　A．PCs solve problems very fast.

　　B．PCs improve businesses a lot.

　　C．PCs help people in different ways.

　　D．PCs cut people working time.

　　解析：主题句在篇末。答案：C(三)(征服) Ireland.For hundreds of years, was forced to give independence to the south of Ireland.The result is that today there are two “Irelands”．Northern Ireland, rop, potatoes, was affected by diseases and about 750，000 people died of hunger.This，and a shortage(短缺) of work, .2 million in 1841 to 6.6 million in 1851.

　　For many years, the majority of Irish people earned their living as farmers.Today, many people still work on the land but more and more people are moving to the cities to work in factories and offices.Life in the cities is very different from life in the countryside, where things move at a quieter and slower pace.

　　The Irish are famous for being warm環earted and friendly.Oscar Wilde, a famous Irish writer, once said that the tIrish were “the greatest talkers since the Greeks”．Since independence, (复兴) its own culture of music, ments such as the violin, whistles, etc.

　　1．The first paragraph mainly tells us________．and

　　解析：没有明确主题句主题隐含在全文中需综合分析才能找到。答案：B________．解析：没有明确主题句需综合分析才能找到主题句。答案：B解析：第一段讲述爱尔答案：C

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