单项选择题

What is the writer's attitude to the climate in the future

A．Disappointed.
B．Pessimistic.
C．Concerned.
D．Optimistic.
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单项选择题
What has happened to the earth's temperature over the last 18 years according to satellite data
A．It has increased slightly.
B．It has not changed.
C．It has decreased slightly.
D．It is not sure if it has changed.
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