单项选择题

Although the national government has introduced some new laws on this subject, it is ______the state governments which are responsible for pollution control.

A．precisely
B．primarily
C．progressively
D．preliminarily
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单项选择题
Although Jim is happy with his success he wonders ______ will happen to his private life.
A．that
B．what
C．this
D．it
单项选择题
Some companies have introduced flexible working time with less emphasis on pressure ______.
A．than more on efficiency
B．and more efficiency
C．than efficiency
D．and more on efficiency
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