单项选择题

______ there is something else to discuss, I will declare the meeting closed.

A．As
B．Though
C．Unless
D．While
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单项选择题
The tree was cut ______.
A．down
B．in
C．off
D．out
单项选择题
The idea ______ good, but I'm afraid it is impractical.
A．hears
B．sounds
C．looks
D．feels
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