单项选择题


Passage One
Questions 26 to 28 are based on the passage you have just heard.

A．Light darkens silver salt.
B．Light darkens natural salt.
C．Light darkens silver.
D．Light darkens self-developing film.
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A．How to study Italian Grammar.B．How to enlarge her Italian vocabulary.C．How to improve her speaking and listening in Italian.D．How to improve her reading skills in Italian.
A．How to study Italian Grammar.
B．How to enlarge her Italian vocabulary.
C．How to improve her speaking and listening in Italian.
D．How to improve her reading skills in Italian.
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A．Pollution problems.B．Water supplies around the world.C．An industrial site in Missouri.D．Groundwater pollution.
A．Pollution problems.
B．Water supplies around the world.
C．An industrial site in Missouri.
D．Groundwater pollution.
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