单项选择题

They have developed techniques which are （）to those used in most factories.

A．simpler
B．better
C．superior
D．greater

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单项选择题
In this factory, suggestions often have to wait for months before they are fully （）

A．admitted
B．acknowledged
C．absorbed
D．considered
单项选择题
As it is a very popular play, it would be wise to （）seats in advance.

A．buy
B．preserve
C．book
D．occupy
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