A、It can be cured by a kind of operation. B、It can be cured by a kind of medicine. C、Its main symptom is "forgetful". D、The old

If a person forgets names, places or facts— and has trouble with everyday things like reading or shopping — it may not mean you are getting old. It could be Alzheimer’s disease. So it’s important to see a doctor as soon as you can. There is no cure for Alzheimer’s. But a drug called ARICEPT has been used by millions of people to help relieve their symptoms.
    In studies, ARICEPT has been proved to work for Alzheimer’s. It has helped people improve their memory over time. It has also helped them to keep doing everyday things on their own.
    Ask your doctor if ARICEPT is right for you or your loved one. It is the Number One drug for Alzheimer’s in the world. The sooner you know it’s Alzheimer’s, the better ARICEPT can help.
ARICEPT is good for many but may not be good for everyone. Some people may experience not sleeping well, feeling very tired, or not wanting to eat. In studies, these side effects weren’t serious at all and went away over time. Some people taking ARICEPT may feel light-headed. In this case you should tell your doctors because your condition may get worse.
Questions 29 to 31 are based on the passage you have just heard.
29. What can we learn about the Alzheimer’s disease from the passage?
30. What is the function of the medicine ARICEPT?
31. Under what condition should the person who is taking ARICEPT go to see his doctors?