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．none of the above
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单项选择题
Today it is impossible for people to build a remarkable new civilization because __________.
A．nobody is optimistic about the future
B．human beings are unable to do so
C．people disagree with each other in many ways
D．people are not interested in it
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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