閱讀測驗三篇        Around the world, people love to keep dogs as pets. However, there is something you might not know about these cute animals. If your dog becomes uneasy or sad around you, it might mean you are sick! This is because they may be able to smell that something is wrong with you. At a research center in England, dogs were taught to smell cancer in people’s urine samples. To see if the dogs could really smell the cancer, they gave them a special test. They were brought into a room, and in front of them were six different urine samples. Only one of them came from a person with cancer. Neither the dogs nor the people there knew which urine sample had cancer in it. When they smelled cancer in a urine sample, the dogs had to sit down in front of that sample. One dog, named Bee, was best at the test.    It    found the right sample 60% of the time! So, if your dog smells you too much and looks a bit uneasy, maybe you should visit the doctor just to be on the safe side! uneasy 不安的urine 尿液 neither nor既不 也不
【題組】47. What does “   It   ” mean in the reading?
(A) Bee.
(B) Urine sample.
(C) A research cencer.
(D) Cancer.