单项选择题

The Great Transformation is caused by

A．artificial intelligence and genetic engineering.
B．the shortage of natural resources.
C．the development of practical science.
D．unknown reasons.
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单项选择题
According to the passage, pessimists believe that
A．the future of the world will be better and better.
B．technological advances will destroy the human race at last.
C．human technological advances are useless in people’s life.
D．there is no need to develop technology.
单项选择题
The more chemicals we send into the air, the less land we will possibly have because
A．chemicals will wash away fields.
B．water levels will go up.
C．more and more land will be covered by ice.
D．land is turned into water deliberately.
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