单选题 In some parks visitors are requested to keep ______ the grass.
【正确答案】 D
【答案解析】[解析] 句意：一些公园要求游客远离草地。词义辨析题。keep away：远离，勿靠近；keep out：使……留在外面；keep off：离开，远离；没有keep aside这种搭配。故选D。