单项选择题

A．A discussion of air pollution.
B．Predictions of fuel surpluses.
C．Slides of recently discovered fossils.
D．A description of urban transportation patterns.
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单项选择题
A．She suggested a way out of the difficulty for the man.B．She took the man to where he wanted to go.C．She came a long way to meet the man.D．She promised to help the man.
A．She suggested a way out of the difficulty for the man.
B．She took the man to where he wanted to go.
C．She came a long way to meet the man.
D．She promised to help the man.
单项选择题
According to the passage, people’’s learning activities are possible because they______.
A．believe that emotions are fundamental for them to stay alive
B．benefit from providing help and support to one another
C．enjoy being rewarded for doing the right thing
D．know what is vital to the progress of society
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