单项选择题

______ you understand this rule, you'll have no further difficulty.

A．Once
B．Unless
C．Only
D．Until
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—When shall we meet again—Make it ______ day you like; it's up to you.
A．one
B．any
C．another
D．some
单项选择题
I can ______ you to the market in my car.
A．send
B．pick
C．ride
D．take
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