单项选择题

Readers will find that a library's collection of books usually ______ two categories: fiction and non-fiction.

A．falls into
B．runs into
C．separates into
D．turns into
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单项选择题
It ______ now pretty late, we took our candles and retired to our room.
A．is
B．being
C．turned
D．got
单项选择题
At that time leukemia was almost inevitably ______, but today, more than half of the people with leukemia get a cure.
A．lethal
B．poisonous
C．awesome
D．terrific
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