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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单项选择题
A．To play basketball with friends from work.B．To try out for the company baseball team.C．To get in shape and compete in a cycling race.D．To watch the basketball game live in a stadium.
A．To play basketball with friends from work.
B．To try out for the company baseball team.
C．To get in shape and compete in a cycling race.
D．To watch the basketball game live in a stadium.
填空题
biologically
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