Air pollution is the most serious problem caused by the exist of too many private automobi
A.Y
B.N
C.NG
A.Y
B.N
C.NG
The purpose of the passage is to ______.
A.describe the harmful air pollution
B.explain the way to prevent air pollution
C.recommend a method to avoid air pollution
D.show the worries about the air pollution
A、air pollution in Beijing
B、due to
C、a number of reasons
D、the reason for air pollution
The air pollution exceeds most ________ levels by 10 times or more.
A acceptable
B accessible
C available
D applicable
A.won’t it
B.will it
C.has it
D.does it
Air pollution refers to the presence of all the following EXCEPT______.
A.harmful solids
B.harmful gases
C.harmful liquids
D.harmful chemicals
Air pollution causes airplane accidents because ______.
A.pilots become ill
B.visibility is reduced
C.engines fail.
D.the air is too hot
It is said that air pollution has ________ the rise of the global temperature
A.led into
B.led to
C.led
D.led by
Noise pollution generally receives less attention than ______ air pollution.
A.does
B.it does
C.receives
D.it does over
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