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When I saw a pen lying on the ground, I stopped .A.to pick up itB.to pick it upC.picking up itD.pick

编辑:chaxungu时间:2026-04-24 13:00:05分类:高中英语题库

When I saw a pen lying on the ground, I stopped ________.
A.to pick up itB.to pick it upC.picking up itD.picking it up在线课程B