第二册第八单元-E
正确答案： A
Section B
Directions: In this section, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for the second time, you are required to fill in the blanks with the exact words you have just heard. Finally, when the passage is read for the third time, you should check what you have written.
Most people have (11)_________________ environmental pollution in the form of an open garbage dump. However, pollution can also be
(12)_________________ . Some kinds of pollution do not actually dirty the land, air, or water, but they reduce the quality of life for people and (13)_________________ . For example, noise from (14)_________________ and machinery can be considered forms of pollution.
Environmental pollution is one of the most (15)_________________ problems facing humanity. Badly polluted air can cause (16)_________________ illnesses. Some air pollutants have reduced the capacity of the atmosphere to
(17)_________________ the sun's harmful ultraviolet (18)_________________ . Many scientists believe that these and other air pollutants have begun to change
(19)_________________ around the world. Ocean pollution
(20)_________________ many marine organisms.
Script: Most people have witnessed environmental pollution in the form of an open garbage dump. However, pollution can also be invisible. Some kinds of pollution do not actually dirty the land, air, or water, but they reduce the quality of life for people and other living things. For example, noise from traffic and machinery can be considered forms of pollution.
Environmental pollution is one of the most serious problems facing humanity. Badly polluted air can cause life-threatening illnesses. Some air pollutants have reduced the capacity of the atmosphere to filter out the sun's harmful ultraviolet radiation. Many scientists believe that these and other air pollutants have begun to change climates around the world. Ocean pollution endangers many marine organisms.
正确答案：witnessed
正确答案：invisible