单项选择题

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．A lawyer.B．A teacher.C．A soldier.D．A doctor.
A．A lawyer.
B．A teacher.
C．A soldier.
D．A doctor.
单项选择题
A．In a bookstore.B．At the camera shop.C．In a hospital.D．At a jewelry store.
A．In a bookstore.
B．At the camera shop.
C．In a hospital.
D．At a jewelry store.
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