【導讀】Whoisthisman?Whatishedoing?Whatdidhedobefore?/Whatwashebefore?Whathashegot?Heishisgrandpa.Heisfishing.Hewasatraindriver.Hehasgotatrain.A:Whatdidyoudo?B:Iwasa/an…A:Wheredidyouwork?B:I…A:Whatdoyoudo?B:Iama/an…A:Wheredoyouwork?B:I…A:Whatdidhedo?B:Hewasa/an…A:Wheredidhework?B:He…A:Whatdoeshedo?B:Heisa/an…A:Wheredoeshework?B:He…B:Heworkedonafarm.