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单项选择题
A．No traffic is allowed on some streets.B．Traffic is computer-controlled.C．Cars move very slowly.D．Only one-way streets are open to traffi
A．No traffic is allowed on some streets.
B．Traffic is computer-controlled.
C．Cars move very slowly.
D．Only one-way streets are open to traffi
单项选择题
A．Farmers.B．Tourists.C．Manufacturers.D．Traders.
A．Farmers.
B．Tourists.
C．Manufacturers.
D．Traders.
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