A. a verb

　　B. an animal

　　C. a warning

　　D. an adjective 答案与解析：B　划线词是一个名词。Pronouncing ten nouns including...排除A、D两项。Warning是名词，警告；hawk鹰；deer鹿，因此推测第三个也是一种动物。 22. The African grey parrot Alex can ________.

　　A. answer questions on a quiz show

　　B. understand the figure “7”

　　C. identify five colors and seven shapes

　　D. apply the concept of “none” correctly 答案与解析：D　根据第四部分Ivy League Parrot第二段可知Alex完全依靠他自己理解none的概念，为数量的缺少。 23. What is the passage mainly about?

　　A. Animal communication.

　　B. Animal research.

　　C. Animal intelligence.

　　D. Animal information. 答案与解析：C　由全文第一段的when it comes to intelligence, 和下文可看出全文是关于动物智力的。 Ⅲ.短文改错 As new students at an university in Boston, many of us were unfamiliar with the campus but consequently late for class. One professor, however, was particular intolerant of being late, making clear that no excuse would be acceptable. So when a girl student came in his class one morning late, we expected the worst results.

　　Then the professor demand the reason for her coming late. “I was being waiting online to buy your new book，” she replied very nervously. Looked at the rest of the class, the professor asked, “Well, why were the rest of you late？”

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