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随时随地学习
随时随地学习
On Punctuality-论守时 On of th most important social gracs in th Amrican socity is punctuality which mans arriving on tim. Most popl considr it discourtous for a prson to arriv at an appointmnt latr than th tim agrd on. Also, for most social ngagmnts, spcially thos in a privat hom, it oftn causs inconvninc for a gust to com ithr arlir or latr than th suggstd hour. On Punctuality-论守时
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