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 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 amusing in incidents caused by people's forgetfulness or absent－mindedness. Stories about absent－minded professors have been told for years, and we never get tired of hearing new ones. Unfortunately, however, absent－mindedness is not always funny. There are times when "tricks" of our memory can cause us great trouble.

　　5．If you want to have a good memory，you should ________.

　　A．force yourself to remember things

　　B．make a conscious effort of practice and exercise

　　C．never stop learning

　　D．try hard to remember things

　　答案与解析：B　细节理解题。由第一段第二句"If you have the wish and really make a conscious effort, ..."可知，如果你想有一个好的记忆力的话，你应该有意识地进行练习和训练。

　　6．What can we infer from the last paragraph?

　　A．Absent－mindedness stories can bring people fun.

　　B．Absent－mindedness is more troublesome than forgetfulness.

　　C．Absent－minded professors are often amused by the incidents, too.

　　D．Absent－mindedness happens not only to professors but to all other people.

答案与解析：A　推理判断题。由第四段第一句"We always seem to find