单项选择题

______ we have all the materials ready, we should begin the new task at once.

A．Since that
B．Since now
C．By now
D．Now that
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单项选择题
The new washing machines are ______ at the rate of fifty a day.
A．turned up
B．turned down
C．turned out
D．turned in
单项选择题
He plays tennis to the ______ of all other sports.
A．eradication
B．exclusion
C．extension
D．inclusion
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