3.Weusedtoplay__________whenwewereyoung．A.inthesandB.inthesandsC.onthesandD.onthesands
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题目内容：
3.We used to play__________ when we were young． A.in the sandB.in the sandsC.on the sandD.on the sands
优质解答
on the sands在沙滩上
sand 做名词--沙地,沙滩 [常用复数]
选D
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