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as long as now that if in case
as; pay attention to it that; attract our attention as; pay attention to that; attract our attention to it
being written are writing are written writing
pay...on pay...for pay...of pay...to
which; that that; which what; that that; that
improve improved improving improvement
in which for which which what
look forward to think highly of pay attention to look down upon
being written are written is writing writing
must；should pay should；paid will；shall pay should；pay
finish finished to finish finishing
pay, on pay, for pay, of pay, to
worry about pay attention to take pride in deal with
A.develop developing developed develops
pay attention to look into pick up look for
listen to listening listening to listen
either, or neither, nor not, but both, and
dying away dying out dying down dying off
to keep to keeping in keep in keeping
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