单项选择题

(2008)We will not go to the party______we are politely invited.

A．if
B．however
C．whether
D．unless
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单项选择题
(2007)There is a shortage of parking space;______parking is becoming more expensive.
A．however
B．furthermore
C．therefore
D．anyway
单项选择题
(2005) I hung the picture on the wall_____can be seen well.
A．where
B．where it
C．that
D．so that
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