单项选择题

The book contained a large ______ of information.

A．deal
B．amount
C．number
D．sum
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单项选择题
They are working ______ time to fulfill the task according to the schedule.
A．against
B．over
C．ahead of
D．before
单项选择题
The simplest animals are those whose bodies are simplest in structure and which do the things done by all living animals, such as eating, breathing, moving and feeling, in the most ______ way.
A．bizarre
B．primitive
C．advantageous
D．unique
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