Passage Two Questions 26 to 30 are based on the following passage. Psychologists now believe that noise has a considerable effect on people’s attitudes and behaviors. Experiments have proved that in noisy situations (even temporary ones), people behave more irritably and less cooperatively. in more permanent noisy situations, many people can not work hard, and they suffer from severe anxiety as well as other psychological problems. However, psychologists distinguish between “sound” and “noise”. “Sound” is measured physically in decibels. “Noise” cannot be measured in the same way because it refers to the psychological effect of sound and its level of “intensity” depends on the situation. Thus, for passengers at an airport who expect to hear airplanes taking off and landing, there may be a lot of sound, but not much noise (that is, they are not bothered by the noise). By contrast, if you are at a concert and two people behind you are whispering, you feel they are talking noisily even if there is not much sound. You notice the noise because it affects you psychologically. Both sound and noise can have negative effects, but what is most important is if the person has control over the sound. People walking down the street with earphones, listening to music that they enjoy, are receiving a lot of decibels of sound, but they are probably happy hearing sounds which they control. On the other hand, people in the street without earphones must tolerate a lot of noise which they have no control over. It is noise pollution that we need to control in order to help people live more happily. 26．According to the passage, people ____ A) can not work in a noisy situation B) will suffer from complete deafness because of noise pollution C) can be psychologically affected by working in very noisy factories D) may cooperate well in a noisy surrounding
27．“Sound”, as defined by the psychologists, ____. A) can be measured in the same way that “noise” is measured B) may be extremely harmful to health C) is not at all different from “noise” D) can be measured by machines
28．The intensity of noise can be measured by ____. A) its effect on people’s hearing B) its decibel C) how much it affects people psychologically D) how long it lasts
29．According to the passage, which of the following is sound rather than noise? A) A couple’s whisper behind you in the cinema. B) The snore of your roommate. C) The loud motor-horn in the street. D) The sound of airplanes taking off and landing when you are waiting to board plane.
30．We can conclude from the passage that we need to control noise pollution if ____. A) we want to stay both psychologically and physically healthy B) we want to have better control over ourselves C) we want to cooperate well D) we don’t want to be anxious