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
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
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 arm.
D．A computer controller.
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