【单选题】To cope with pollution the author suggests ______.
                    
A.wearing gas masks
B.encouraging the use of cars
C.encouraging the use of mass transportation
D.punishing the motorists
                
							【单选题】To cope with pollution the author suggests ______.
                    
A.wearing gas masks
B.encouraging the use of cars
C.encouraging the use of mass transportation
D.punishing the motorists
                
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