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why

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Personally, I think subway should be most efficient transportation in my country. First of all, when subway was invented, people could quick go to company have work, such as when we by bus or drive car go to work many you will be late because traffic jam on the road. However, when you by subway go to work that is never happened. Also, nowadays is environmental protection, you know the subway just use electricity to work that is good for environmental. Therefore I often by subway go to work. Based on the above two points I think that is most efficient transportation in my country.
 
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