Bob___alotofSpanishbyplayingwiththenativeboysandgirls.A.pickedupB.tookupC.madeupD.turnedup选哪个,解释下
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题目内容：
Bob ___a lot of Spanish by playing with the native boys and girls.
A.picked up B.took up C.made up D.turned up
选哪个,解释下
优质解答
A.picked up 无意中学会
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