New cities appeared on ( ) sides of the river.

Playing ( ) is the most important principle in a competition, and all competitors should be treated ( ).

A、fairly/ fairly
B、fairly/ fair
C、fair/ fairly
D、fair/ fair

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Remember you must never waste anything, but ( ) never waster time.

A、as a matter of fact
B、after all
C、above all
D、most of all

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