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 provides autos with electric power in an automated highway system
A．A rail.
B．An engine.
C．A retractable arm.
D．A computer controller.
单项选择题
The newest state in the United States is______.
A．New Mexico
B．Alaska
C．California
D．Hawaii
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