二、考查解释说明 此类题多位于段中或段尾,一般空格处的句子是对前一句话的进一步解释、说明或展开,前后句的话题相同但能体现出层次性。如: Some people say we live in a dog-eat-dog world. 　2    They say that to be successful, a person has to work like a dog. This means they have to work very, very hard. Such hard work can make people dog-tired. And, the situa-tion would be even worse if they became sick as a dog. A.Still, people say every dog has its day. B.We do not want it to rain cats and dogs. C.Some people are compared to dogs in bad ways. D.Dogs are their best friends and they are loyal to people.