But those who are against the research say that changing memories is very dangerous because memories give us our identity. They also help us avoid the mistakes in 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 am not sure whether we’d want to wipe those memories out.” said Rebecca Dresser, a medical ethicist.
56. The underlined word “it” in Paragraph 4 refers to “_____”.
A. the new drug B. the research into the drug
C. the bad memory D. the chemical in the drug
57.Which of the following is NOT the opinion of the opponents(反对者)?
A. Our memories give us our identity.
B. The memories help human avoid mistakes of the past.
C. The drug should be used in only very serious cases.
D. People may not be sure whether they want to wipe the memories out.
58. What’s the main idea of this passage?
A. People often suffer from bad memories.
B. American researchers have developed a pill.
C. Forget bad memories, and be happy.
D. Developing pills for helping forget bad memories has caused a heated argument.
B
A woman in Japan who had no home sneaked into(潜入)a man’s house and lived without being noticed in his closet for a year. She was arrested after the man found that his food was disappearing and reported it to the police.
Police found the 58-year-old woman Thursday hiding in the top part of the man’s closet and arrested her for getting in without the owner’s permission.
The man had security cameras which sent images(图像)to his cell-phone after becoming confused by food disappearing from his kitchen over the past several months.
One of the cameras on Thursday caught someone moving inside his home after he had left, so he called the police who at first thought it was a thief. However, when they arrived, they found the door locked and all windows closed.
“We searched the house and checked every corner where someone could possibly hide,” Itakura said. “When we opened the closet, we found the woman curled up(卷曲)on her side, feeling nervous and frightened.”
The woman told the police that she had no place to live and first sneaked into the man’s house about a year ago when he left it without locking the door.
“She had moved a mattress(垫子)into the small closed space and even took showers,” Itakura said. He called the woman “tidy and clean”.
59. The police arrested the woman mainly because______________.
A. she stole the man’s food.
B. she often went into other people’s houses.
C. she entered the man’s house without permission.
D. she didn’t open the door when the police arrived
60. According to the passage, when the woman was found by the police, she______.
A. was stealing food in the kitchen. B. felt nervous and frightened
C. was untidy and dirty D. tried to jump off the window
61. Which of the following is correct?
A. The woman doesn’t like living in her own house.
B. The man always forgets to lock his door when he leaves.
C. The woman first sneaked into the man’s house about a year ago.
D. The woman was over sixty years old when she was arrested.
C
Some scientists say that animals in the oceans are increasingly threatened by noise pollution caused by human beings.
The noise that affects sea creatures comes from a number of human activities. It is caused mainly by industrial underwater explosions, ocean drilling, and ship engines. Such noises are added to natural sounds. These sounds include the breaking of ice fields, underwater earthquakes, and sounds made by animals themselves.
Decibels (分贝) measured in water are different from those measured on land. A noise of one hundred and twenty decibels on land causes pain to human ears. In water, a decibel level of one hundred and ninety-five would have the same effect.
Some scientists have suggested setting a noise limit of one hundred and twenty decibels in oceans. They have observed that noises at that level can frighten and confuse whales.
A team of American and Canadian scientists discovered that louder noises can seriously injure some animals. The research team found that powerful underwater explosions were causing whales in the area to lose their hearing. This seriously affected the whales' ability to exchange information and find their way. Some of the whales even died. The explosions had caused their ears to bleed(流血)and become infected(感染).
Many researchers whose work depends on ocean sounds are against a limit of one hundred and twenty decibels. They say such a limit would mean an end to important industrial and scientific research.
Scientists do not know how much and what kinds of noises are harmful to ocean animals. However, many scientists suspect(怀疑)that noise is a greater danger than they believed. They want to prevent noises from harming creatures in the ocean.
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