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A．People in Asian countries.
B．People in African countries.
C．People in underdeveloped countries.
D．People in wealthy countries.
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A．The safety of cars has been decreased by the addition of seat belts.B．The safety of cars has been increased by the addition of seat belts.C．Some people pay no attention to seat belts when driving.D．Some people don’ t use seat belts when drivin
A．The safety of cars has been decreased by the addition of seat belts.
B．The safety of cars has been increased by the addition of seat belts.
C．Some people pay no attention to seat belts when driving.
D．Some people don’ t use seat belts when drivin
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