单项选择题

The birth control measures have helped to ______ the city’’s population.

A．hold up
B．hold off
C．hold on
D．hold down
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单项选择题
A．improveB．enhanceC．developD．proceed
A．improve
B．enhance
C．develop
D．proceed
单项选择题
I decided to go to the library as soon as I ______
A．finish what I did
B．finished what I did
C．finished what I was doing
D．would finish what I was doing
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