3.We used to play__________ when we were young． A.in the sandB.in the sandsC.on the sandD.on the sands
问题描述：
3.We used to play__________ when we were young． A.in the sandB.in the sandsC.on the sandD.on the sands
答
C
答
D on the sands 对沙子来说是一颗颗的，是可数名词
答
on the sands在沙滩上
sand 做名词--沙地,沙滩 [常用复数]
选D