单项选择题

What is the author's attitude toward the future of autos

A．Enthusiastic.
B．Pessimistic.
C．Optimistic.
D．Cautious.
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单项选择题
What provides autos with electric power in an automated highway system
A．A rail.
B．An engine.
C．A retractable ann.
D．A computer controller.
单项选择题
One significant improvement in the future car will probably be ______
A．its power source
B．its driving system
C．its monitoring system
D．its seating capacity
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