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People in China records by putting a number of stones together long long ago.A.were used to keepB.us

编辑:chaxungu时间:2026-04-24 13:00:53分类:高中英语题库

People in China ________ records by putting a number of stones together long long ago.
A.were used to keepB.used to keepC.were used to keepingD.used to keeping在线课程B