单项选择题

Questions 14—16 are based on the following passage. You now have 15 seconds to read the Questions 14—16.
15 What does the speaker tell you to do if you want to have a good memory

A.You should do more arm and leg exercises.
B.You have used your memory too much.
C.Don’t learn how to read and write.
D.You should do more remembering exercises.