People in the United States love their dogs and treat them well. They use many expressions with the word "dog". Here are some examples: Some people say we live in a "dog-eat-dog world", which means many people are competing for the same thing. They also say that a person has to "work like a dog" if he wants to succeed, so "work like a dog" here means "work very hard". Besides, people say "Every dog has its day." This means that every person enjoys a successful period during his or her life. If a man tells you that he is "in the doghouse", he might have been punished by his wife. However, the husband may decide that it is best to leave things alone and not to cause more trouble. He might decide to "let sleeping dogs lie".
Dog expressions are also used to describe the weather. "The dog days of summer" refers to the hottest days of the year. A rainstorm may cool the weather, but to "rain cats and dogs" is not what we want.
单选题 Americans use the word "dog" in many expressions probably because______.
【正确答案】 B
【答案解析】细节推断题。由题干中的Americans，“dog”，many expressions定位到文章第一段前两句。本题考查美国人在很多表达中用“狗”这个词的原因。定位句提到，美国人喜欢狗、善待狗，并且使用很多含有“狗”这个词的表达，由此可以推测，B)“美国人非常喜欢狗”符合题意。
单选题 The expression "work like a dog" means "______".
【正确答案】 D
【答案解析】细节辨认题。由题干中的“work like a dog”定位到文章第一段第四句。定位句提到，“像狗一样工作”意思是工作非常努力(work very hard)，因此D)符合题意。
单选题 When you say everyone enjoys a successful period during his life, you would say______.
【正确答案】 B
【答案解析】细节辨认题。由题干中的enjoys a successful period定位到文章第一段第五、六句。第五句提到了“Every dog has its day”，第六句对其含义进一步解释：每个人都会享受自己生活中一段成功的时光，因此选B)。
单选题 If one does not want to cause any trouble, he will______.
【正确答案】 B
【答案解析】事实细节题。由题干中的cause和trouble定位到第一段倒数第二句。再结合本段最后一句可知，丈夫会让事情保持原样，不会自找麻烦，故选B)。
单选题 In this passage, the author wants to______.
【正确答案】 B
【答案解析】主旨大意题。本题考查对文章主旨大意的概括能力。归纳全文可知，作者在篇首说，美国人在很多表达中都使用了“狗”这个词，随后列举了几个带有“狗”的习语，并逐个介绍其含义和使用语境。由此判断，作者的意图是介绍含有“狗”的习语及其含义，故选B)。