例一：
Directions：Choose the most general sentence.
hotel offers complimentary coffee from 7to y.
e are many reasons why guests feel at home at the Glorietta Bay Inn.
coin-operated laundry room has an ironing board.
e are a number of extra services at the Glorietta Bay Inn including baby-sitting.
A、C、D都是从不同的侧面说明旅馆的服务情况，相互间并无联系。而B却概括了A、C、D的共性的东西，即：为什么旅客住在这家旅馆里有宾至如归的感觉。因此，B符合题意，倘若在一段文章中包含了以上A、B、C、D几条信息，那么，B就是该段的.中心思想。出于同样的道理，如果在一篇文章中，作者分段叙述几方面的内容，那么，这些段落所围绕和要说明的问题就是该文的中心思想。
例二：
Directions：Choose the main idea of the article.(Following are the topic sentences of an article.)
1)A mounting body of evidence suggests that fighting violence with violence rarely deters a crime in progress and greatly increases the chances of changing a robbery into a violent attack on the victim....
2)One report shows that at least 100 thousand handguns are stolen from private owners each year，the vast majority during burglaries....
