题目

阅读理解Dogs may have earned the title of our best friends through their interactions with humans, but now researchers say these social skills could be present shortly after birth rather than being learned.To better understand the role of biology in dogs' abilities to communicate with humans, the researchers studied 375 eight-week-old service dogs. They looked at how these dogs performed in a series of tasks designed to measure their communication skills. The puppies were still living with their littermates (同窝出生者) and had not been sent to live with a volunteer puppy raiser, making it unlikely that they had learned about his or her behavior.In the first task, a person hid a treat beneath one of two overturned cups and pointed to it to see if the puppy could follow the gesture. Since dogs are good at using noses to find things, a treat was also taped to the insides of both cups. In the second task, puppies watched as the researchers placed a yellow block next to the correct cup, instead of pointing to indicate where the puppy should look for the food.The third task was designed to observe puppies' tendency to look at human faces. The researchers spoke to the puppy in a voice people sometimes use when talking to a baby. They then measured how long the puppy fixed a stare on the human.In the last task, researchers sealed a treat inside a closed container and presented it to the puppy. They then measured how often the puppy looked to the human for help in opening the container.The study found that while many of the puppies were responsive to humans' physical and verbal cues, very few looked to humans for help with the unsolvable task. Researchers said, "This suggests that while puppies may be born knowing how to respond to human-initiated communication, the ability to initiate communication on their own may come later." The next step will be to see if specific genes that may contribute to dogs' abilities to communicate with humans can be identified. （1） Why were eight-week-old service dogs chosen for the study? A . They had had little contact with humans before. B . They were unlikely influenced by their mates. C . They were cute and safe to deal with. D . They were at the best age to learn. （2） What is the researchers' purpose in taping food to both cups? A . To provide clues for the puppies'final decisions. B . To make comparisons between different conditions. C . To prevent the puppies from making use of their smell. D . To check the puppies' preference for a particular color. （3） What can we know from the study? A . Puppies can understand our body language. B . Puppies are good at asking humans for help. C . Puppies are born to arouse communication with humans. D . Puppies need specific genes to communicate with humans. （4） What can be the best title for the text? A . Dogs—talented performers B . Dogs—humans' best friends C . Dogs—born to be able to learn D . Dogs—born to understand humans 答案： A C A D

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