单项选择题

______ that there are no further questions, we'll end the meeting here.

A．Unless
B．If
C．Provided
D．As long as
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单项选择题
He is a good-natured man, but there is a limit to his ______.
A．patient
B．patience
C．impatient
D．impatience
单项选择题
When he came back after graduation, he found his hometown completely ______.
A．changed
B．changing
C．to change
D．to be changed
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