4、冒号
冒号在英语句子中也是起到解释说明冒号前面信息的作用。
Typically, children do not end up on the streets due to a single reason, but to a combination of factors: a dearth of adequately funded schools, the demand for income at home, family breakdown and violence. (C4T3P1)
解析：根据前后之间的并列关系，可以推测dearth是名词，且是贬义，相当于lack、shortage、inadequacy、deficiency。
5、分号
分号用来连接前后两个句子，相当于适当的“逗号+并列练习and，but或or+句子”。词汇猜测时，利用的是分号前后两个句子之间的逻辑关系是列举、转折还是选择。
Some corpora attempt to cover the language as a whole, taking extracts from many kinds of text; others are extremely selective, providing a collection of material that deals with only a particular linguistic feature. (C4T3P3)
解析：根据前后之间的语境，判断出“extremely selective”即指“不全面的，只是包含一部分的”。
