1. (2019高三上·金山期末) 根据所听到的短文，选择正确的选项

Not all memories are sweet. Some people spend all their lives trying to forget bad experiences.<br />Violence and traffic accidents can leave people with terrible physical and emotional scars.<br />Often they relive experiences in nightmares.<br />Now American researchers think they are close to developing a pill that will help people forget bad memories.<br />The pill is designed to be taken immediately after a frightening experience.<br />They hope it might reduce or possibly wipe out the effect of painful memories.<br />In November, experts tested a drug on people in the US and France.<br />The drug stops the body releasing chemicals that fix memories in the brain.<br />So far, the research has suggested that only the emotional effects of memories may be reduced,<br />not that the memories are wiped out.<br />They are not sure to what degree people's memories are affected.<br />The research has caused a great deal of argument.<br />Supporters say it could lead to pills that prevent or treat soldiers troubling memories after war.<br />But those who are against the research say that maybe the pills can change people's memories<br />and changing memories is very dangerous because memories give us our identity.<br />They also help us all avoid the mistakes of the past.<br />Not all memories are sweet. Some people spend all their lives trying to forget bad experiences.<br />Violence and traffic accidents can leave people with terrible physical and emotional scars.<br />Often they relive experiences in nightmares.<br />Now, American researchers think they are close to developing a pill that will help people forget bad memories.<br />The pill is designed to be taken immediately after a frightening experience.<br />They hope it might reduce, or possibly wipe out, the effect of painful memories.<br />In November, experts tested a drug on people in the US and France.<br />The drug stops the body releasing chemicals that fix memories in the brain.<br />So far, the research has suggested that only the emotional effects of memories may be reduced,<br />not that the memories are wiped out.<br />They are not sure to what degree people's memories are affected.<br />The research has caused a great deal of argument.<br />Supporters say it could lead to pills that prevent or treat soldiers troubling memories after war.<br />But those who are against the research say that maybe the pills can change people's memories<br />and changing memories is very dangerous because memories give us our identity.<br />They also help us all avoid the mistakes of the past.<br />Questions. What is the passage mainly about?<br />What effect can the drug tested on people produce?<br />Which of the following statements is true?

1. （1） What is the passage mainly about?

   A . The impact of painful memories. B . New research on a pill and the argument about it. C . A way of wiping out painful memories. D . A proper method for changing memories.
3. （2） What effect can the drug tested on people produce?

   A . It can cause the brain to fix memories. B . It can stop people remembering bad experiences. C . It can prevent the body producing certain chemicals. D . It can wipe out the emotional effects of memories.
5. （3） Which of the following statements is true?

   A . Experts are not sure about the effects of the pill. B . The pill will certainly stop people's emotional memories. C . Taking the pill will do harm to people's physical health. D . The pill has already been produced and used by the American public.