how often do you ___a bird count ---Twice a yearA.make B.do C.produce D.take

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howoftendoyou___abirdcount---TwiceayearA.makeB.doC.produceD.takehowoftendoyou___abirdcount---Twiceay

how often do you ___a bird count ---Twice a yearA.make B.do C.produce D.take
how often do you ___a bird count ---Twice a year
A.make B.do C.produce D.take

how often do you ___a bird count ---Twice a yearA.make B.do C.produce D.take
do.do a count表示清点.

A