阅读理解。 There are many idioms in English that are about animals. Today let's chat a little about some of the idioms about dogs that make English language fun and colorful. We love dogs; they are our best friends. When you first started to learn English, your teacher might teach you a number of phrases about dogs, such as: 'you are a lucky dog,' 'I'm dog tired,' 'every dog has its day,' or 'our team was the underdog but won the first place at last.' When I first got into high school, my English teacher used the idiom 'dog-ear', which interested me very much. This word can be used as a noun, a verb, and an adjective as well. As a noun, it means a turned-down (折叠的) corner of a page as a bookmark. As a verb, it means someone makes a bookmark by turning down the corner of a page in the book. And, as an adjective, the word describes an old book with many broken pages. Examples: John made a dog-ear (noun) of the page he was reading before closing the book. Jane was reading a book; when the telephone rang, she dog-eared (verb) the page before answering the phone. In the old room, the children found some dog-eared (adjective) books left there for more than 30 years. 1. Which of the following can be the best title of the passage? [     ] A. Idioms about colors. B. Idioms about history. C. Idioms about animals. D. Idioms about dogs. 2. How many idioms about dogs are mentioned in this passage? [     ] A. 3. B. 4. C. 5. D. 6. 3. Which of the following statements is NOT true about the meaning of the idiom 'dog-ear'? [     ] A.It means a turned-down corner of a page as a bookmark.. B.It means someone makes a bookmark by turning down the corner of a page in the book. C.It means an old book with many broken pages. D.It means something is short and small ike a dog's ear.