单项选择题

They decided to chase the cow away ______ it did more damage.

A．unless
B．until
C．before
D．although
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单项选择题
He would have paid ______ for the house if the salesgirl had insisted because he really wanted it.
A．twice as much
B．much as twice
C．as much twice
D．twice much as
单项选择题
If anyone happens to drop in while I am out, ______ him or her leave a message.
A．have
B．get
C．ask
D．tell
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