单项选择题

According to Larson, to redress the traffic problem______

A．car pooling must be studied
B．rapid mass-transit systems must be introduced
C．flexible work hours, must be experimented
D．overall strategies must be coordinated

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热门试题

单项选择题

According to the passage, the smart highway technology is aimed to______

A．deploy sophisticated facilities on the interstate highways
B．provide passenger vehicles with a variety of services
C．optimize the highway capabilities
D．improve communication between driver and the traffic monitors

单项选择题

With a view to correcting the mistakes of our forefathers, the author suggests that______

A．we plant more trees
B．we be taught environmental science, as well as the science of plants
C．environmental education be directed toward everyone
D．we return to nature