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 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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