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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单项选择题
What is the author's attitude toward the future of autos
A．Enthusiastic.
B．Pessimistic.
C．Optimistic.
D．Cautious.
单项选择题
What is the author's main concern
A．How to render automobiles pollution- free.
B．How to make smaller and safer automobiles.
C．How to solve the problem of traffic jams.
D．How to develop an automated subway system.
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