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NOT all memories are sweet. Some people -- all their lives trying to forget bad experiences. Violence and traffic accidents can leave people with terrible physical and emotional scars (傷痕).
Now American researchers think they are close to developing a pill, which will help people forget bad memories. The pill is designed to be taken immediately after a frightening experience. They hope it might reduce, or possibly erase, the effect of painful memories.
In November, experts tested a drug on people in the US and France. The drug stops the body producing chemicals that fix memories in the brain (大腦). So far the research has suggested that only the emotional effects of memories may be reduced, not that the memories are erased.
The research has caused a great deal of discussion. Some think it is a bad idea, while others support it.
Supporters say it could lead to pills that prevent or treat soldiers' troubling memories after war. They say that there are many people who suffer from terrible memories.
"Some memories can destroy people's lives. They come back to you when you don't want to have them in a daydream or nightmare (噩夢). They usually come with very painful emotions," said Roger Pitman, a professor of psychiatry at Harvard Medical School. "This could relieve a lot of that suffering."
But those who are against the research say that changing memories is very dangerous because memories give us our identity (特質). They also help us all avoid the mistakes of the past.
"All of us can think of bad events in our lives that were horrible at the time but make us who we are. I'm not sure we want to wipe those memories out, "said Rebecca Dresser, a medical ethicist.
【小題1】The passage is mainly about          

根據短文內容，從各題所給的A、B、C、D四個選項中選出最佳選項。

Tom woke up on Monday morning.  He felt  1 . He always felt sick on Monday mornings. He had to go to school for a  2  week! He almost wished there were no week-ends.   3  was even more difficult for him to go back to school!

He  4  in bed and wondered what excuse（借口）he could make this time. He looked at his body, but could find  5   wrong, A little headache?   6  . He had used that excuse many times. Then he realized that one of his teeth was loose（松動）. Good! He was just going to start groaning（呻吟）  7   he thought that Aunt Polly would pull the tooth out. That  would   8  ! He looked for something else. Suddenly he remembered what the doctor had said about a certain problem with toes. He pulled his right foot out and looked at it.   9  of the toes was really hurting, Tom began to groan.

“What’s  10  with you?” Aunt Polly asked.

     “My toe hurts.”

     The old lady fell into a chair,   11  a little. “Tom, you frightened me. Now shut up at once and get out of 12 .”

Tom felt like a thief being caught. “Well, it seemed all right. It hurt so Much  13  I forgot my tooth.”

      “Tooth, eh? What’s wrong with your tooth?”

 “One of them is loose and it hurts  14  .”

“No problem,” answered Aunt Polly. “I can pull it out.”

 “Please, Auntie! Don’t pull it out. It has  15  hurting now. Please!”

     “No way! Well, you’ll have your tooth out and you’ll go to school?

1. A. happy               B. tired              C. sick                   D. hungry

2. A. whole               B. all                 C. next                   D. this

3. A. That                 B. This              C. The weekend        D. It

4. A. lie                    B. lay                C. lied                     D. lying

5. A. something        B. anything        C. everything            D. nothing

6. A. No                  B. Yes               C. None                  D. Great

7. A. then                 B. when               C. while                 D. as

8. A. pain                 B. work               C. hurt                  D. be good

9. A. One                 B. Two              C. Some                  D. Many

10. A. matter              B. trouble            C. problem              D. wrong

11. A. saying            B. smiling            C. shouting              D. talking

12. A. school            B. chair               C. bed                     D. kitchen

13, A. what             B. which             C. that                     D. until

14. A. bad               B. badly              C. worse                   D. terrible

15. A. stopped        B. forgotten            C. enjoyed               D. begun