单项选择题

The machine will continue to make much noise_______ we have it repaired.

A．when
B．because
C．if
D．unless
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单项选择题
The children are getting more and more excited when Christmas is _______ near.
A．drawing
B．joining
C．taking
D．operating
单项选择题
The manager told us never to _______till tomorrow what we can do today.
A．come up
B．put off
C．turn on
D．give out
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