KEY:

Part one
1.A
2.B
3.D
4.D
5.C

原文：
Since memory plays a significant role in our life, scientists are increasingly interested in research on how to improve memory. Here are some factors they believe to be important in expanding memory capacity. To begin with, you must take special care in your daily life. Food for example, is very important. Some vitamins are essential for your memory to work properly. They are found in bread, cereal, vegetables and fruits. Some experts say that synthesized vitamins improve memory, but others have doubts about this, arguing that the studies have not confirmed they do work. Another essential factor is water. It helps to maintain the memory systems, especially in older persons. According to Dr. Rosewell, lack of water in the body has an immediate and strong effect on memory; it can cause confusion and other thought difficulties. Sleep also plays a significant role. To be able to have a good memory, we must allow the brain to have plenty of rest. While sleeping, the brain no longer controls the senses, and starts to revise and store the information one has received. Lack of sleep would make one feel exhausted and would weaken one's ability to store information would be affected.

Part two
1. I can't think of it off the top of my head
2. They usually don't release private information over the phone