Assuming he's still alive, how old would he be now?

　　假定他還活著，現在有多大年紀了？

　　How old is she ─ seventy odd?

　　她多大年紀？七十出頭？

　　How old is your son now?

　　你兒子現在多大了？

　　How old are you?

　　您多大歲數了？

　　How old is she?

　　她多大年紀了？