Memory， they say，is a matter of practice and exercise. If you have the wish and really make a conscious（有意识的）effort，then you can quite easily improve your ability to remember things. But even if you are successful，there are times when your memory seems to play tricks on you.
Sometimes you remember things that really did not happen. One morning last week，for example，I got up and found that I had left the front door unlocked all night，yet I clearly remembered locking it carefully the night before.
Memory “tricks” work the other way as well. Once in a while you remember not doing something and then find out that you did. One day last month，for example，I was sitting in a barbershop（理发店）waiting for my turn to get a haircut，and suddenly I realized that I had got a haircut two days before at the barbershop across the street from my office.
We always seem to find something funny and interesting in incidents（事件）caused by people’s forgetfulness or absent-mindedness. Stories about absent-minded professors have been told for years. Unfortunately，however，absent-mindedness is not always funny. There are times when “tricks”of our memory can cause us great trouble.
If you want to have a good memory， _____.

A．you should ask someone else to help you to remember things

B．you should make a conscious effort to practice and exercise

C．you should never stop learning

D．you should try hard to remember things

In the passage，the writer seems to tell us _____.

A．forgetting things is serious and dangerous

B．always forgetting things is understandable

C．forgetting things at times is natural

D．the ways to protect yourself from memory “tricks”

The best title for this passage is“_____”.

A．How to Get a Good Memory

B．Tricks of Memory

C．The Danger of Forgetfulness and Absent-mindedness

D．Get Rid of Absent-mindedness