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
People in developing countries also live under thatch because______.
A．thatched cottages are a big tourist attraction
B．thatched roof houses are the cheapest
C．thatch is on effective defense against the heat
D．they like thatched houses better than other buildings
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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