单项选择题
At the end of the passage the author seems to suggest that life in future is
A．disastrous.
B．unpredictable.
C．exciting.
D．colourful.
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单项选择题
The stone chip is thought to be the most important tool because it
A．was one of the first tools.
B．developed human capabilities.
C．led to the invention of machines.
D．was crucial to the development of mankind.
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单项选择题
In the last paragraph, the author thinks that pictures
A．should be made comprehensible.
B．should be made interesting.
C．are of much use in our life.
D．are disappearing from our life.
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