Passage Three

　　Questions 31 to 35 are based on the following passage.

　　It is difficult to imagine what life would be like without memory. The meanings of thousands of everyday perceptions, the bases for the decisions we make, and the roots of our habits and skills are to be found in our past experiences, which are brought into the present by memory.

　　Memory can be defined as the capacity to keep information available for later use. It includes not only "remembering" things like arithmetic or historical facts, but also involves any change in the way an animal typically behaves. Memory is involved when a rat gives up eating grain because he has sniffed something suspicious in the grain pile. Memory is also involved when a six-year-old child learns to swing a baseball bat.

　　Memory exists not only in humans and animals but also in some physical objects and machines. Computers, for example, contain devices for storing data for later use. Il is interesting to compare the memory-storage capacity of a computer with of a human being. The instant-access memory of a large computer may hold up to 100,000 "words"—already for instant use. An average U. S. teenager probably recognizes the meaning of about 100,000 words of English. However, this is but a fraction of the total amount of information which the teenager has stored. Consider , for example, the number of faces and places that the teenager can recognize on sight.

　　The use of words is the basis of the advanced problem-solving intelligence of human beings. A large part of a person's memory is in terms of words and combinations of words.

　　31. According to the passage, which of the following is NOT closely connected with memory?

　　A. Environment B. Life C. Habits D. Skills

　　32. What is memory according to the passage?

　　A. Ability to keep information.

　　B. Attention to historical facts.

　　C. Way an animal or a child behaves.

　　D. Learning mathematics.

　　33. Which of the following is NOT the place where memory exists?

　　A. In humans B. In words C. In machines D. In animals

　　34. What does the phrase “ a fraction of” in paragraph 3 mean ?

　　A. The same amount as B. A lot of C. A small part of D. Most of

　　35. What is the passage mainly talking about?

　　A. Comparison between human and computers’ memory.

　　B. What memory is.

　　C. Memory and words.

　　D. Life without memory.