题目内容
What happens to a person if he loses ________ of his blood(血)？
- A.three fourth
- B.one thirds
- C.two third
- D.two thirds
Stop. Listen! What do you hear? You may hear many different sounds. Some of those sounds may be noise. Noise is a loud or unwanted sound.
Noise can be caused by many kinds of machines, such as motorcycles, jet planes, farm tractors(拖拉机), rock music is also noise.
What happens to people who live near noisy machines or use them over a period of time? Doctors have found that these people have trouble in sleeping. But, most important, constant(不断的) loud noise can cause a loss of hearing.
Scientists use a unit of measure called decibel(分贝) to measure the loudness of a sound. The sound of a quiet room, for example, measures 35 decibels. Talking measures between 40 and 65 decibels. Sounds from traffic and from some rock bands can measure over 120 decibels. Noise at this high level(层次) causes the great hearing loss.
根据短文内容，选择正确的答案（每小题1分，共5分）
【小题1】According to the passage, noise is .
| A．any kind of sound | B．a loud or unwanted sound |
| C．all sounds that you can hear | D．terrible sound |
| A．unit that measures sound | B．kind of noise |
| C．machine that makes loud noise | D．person who hates sound |
| A．help people to sleep better | B．stop machines |
| C．cause a loss of hearing | D．kill people |
| A．noise is a serious problem | B．rock music isn’t noisy |
| C．noise is only from traffic | D．some people hate any sound |
| Room Noise Level A 40~65 decibels B 35 decibels C 120 decibels D 130 decibels |
Santi's big brother Len had told him never to push all the remote control buttons at the same time. He said that something terrible would happen if he did. Santi didn't really believe this. While Len was out of the room, Santi jumped down on the sofa with the remote control in his hand. For a while, he changed from channel to channel, looking for something interesting to watch. Bored, Santi decided to see what Len could have meant.
With a quick glance（扫视） over his shoulder to make sure Len hadn't come back，he pushed all the buttons at once. Santi saw a bright flash，and he dropped the remote control. "I've broken it，"he thought. "Now I'm in trouble！" As he looked around for the remote control，he realized he was in more trouble than he'd thought. He was suddenly only the size of a mouse.
"Oh，no！"Santi shouted. He had to find his parents quickly. Carefully, he climbed down the side of the huge sofa and hurried across the floor. In the kitchen, Santi could see that the sliding door（滑门） had been left open. “If the door is open, then the cat might be in here,” tiny Santi said.
Just then, Santi and the cat saw each other. Santi ran for the door, the cat closing in quickly behind him. Just as the cat reached out to attack Santi, it slipped（打滑） on some water and slid across the kitchen floor. Out of breath, Santi hid behind a flowerpot in the corridor. He could see his mum far away in the garden. “How will I ever get there?” he wondered. As he looked out from behind the flowerpot, there was the huge cat looking right at him! Santi rushed for the garden and then…, he woke up. “It was only a dream!” he said with a relieved smile. “Thank goodness!”
【小题1】Len told Santi something terrible would happen if he _________.
| A．changed from channel to channel |
| B．tried to pretend（假装）to be a mouse |
| C．pushed the buttons at the same time |
| D．stayed alone in the living room |
| A．he heard a moving sound |
| B．the cat liked the kitchen |
| C．the sliding door was open |
| D．he saw the cat came into it |
| A．when he was playing with the remote control |
| B．when his big brother warned him something |
| C．when he was no longer worried about the cat |
| D．when he saw his mum far away from him |
| A．what happens if you break a rule |
| B．it’s dangerous to stay alone at home |
| C．people don’t want to get smaller |
| D．sometimes pets are not friendly |