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2013高考英语备考:keep up 用法说明

keep up 该短语动词有以下现象,分述如下: ①keep sth.up使不低落,遵守 如:Even if we fail we should keep up our spirits. ②keep sb.up使晚睡 如:It’s wrong to keep the children up so late. ③keep up with sb.赶上,不落后,保持联系 如:I still keep up with my college classmates far aw...

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