for-and-since练习

用for或since填空1.______twoyears2._______twoyearsago3._______lastmonth4.______19995._______yesterday6._______4o’clock7.______4hours8._______anhourago9._______wewerechildren10._____lunchtime11.______shelefthere12.HehaslivedinNanjing________theyearbeforelast.13.I’veknownhim__________wewerechildren.14.OurteacherhasstudiedJapanese_________threeyears.15.Shehasbeenawayfromthecity___________abouttenyears.16.It’sabouttenyears__________sheleftthecity.