47. From the text we know that the father _____.

　　A. disliked the huge fish                           B. was firm and stubborn

　　C. didn’t love his son                               D. always disagreed with his son

　　48. The successful architect went fishing with his children at the same place because _____.

　　A. they might catch a big fish there           B. he was taught a moral lesson there

　　C. it was a most popular fishing spot        D. their children enjoyed fishing there

　　49. What does the story imply?

　　A. An ethical decision is always easy to make.

　　B. It is easy to say something, but difficult to do.

　　C. It’s hard to tell right from wrong sometimes

　　D. Fishing can help one to make right decisions

　　B

　　Be careful what you say around your dog. It might understand more than you think.

　　A border collie named Rico recognizes the names of about 200 objects, say researchers in Germany. The dog also appears to be able to learn new words as easily as a 3-year-old child. Its word-learning skills are as good as those of a parrot or chimpanzee(黑猩猩).

　　In one experiment, the researchers took all 200 items that Rico is supposed to know and divided them into 20 groups of 10 objects. Then the owner told the dog to go and fetch one of the items and bring it back. In four tests, Rico got 37 out of 40 commands right. As the dog couldn't see anyone to get clues, the scientists believe Rico must understand the meanings of certain words.

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