参考答案：21-25BAABB 26-30CCDAC 31-35DDBAD36-39ECBD 40-43BDAE44. festival 45.nine 46.politely 47.difference 48.social 49.Unluckily 50.likely 51.enable52. Is,chatting 53.What does 54.so that 55.be written 56.he enjoyed 57.kept,for 58.Somevolunteers offer smartphone training to the elderly every month.59-64BDCABB65-70CDBCAD71-77 friendly;create;fresh;reuse;products;hardly;stories78.Yes,he did.79.They ordered a large three-tier birthday cake and decorated the house with colorful belts andballoons.80.She owned it for 40 years.81.She felt sad and disappointed.82.Because he found the old one full of tiny holes while washing it.83.Detail 1:Grandpa wrapped the gift well and prepared a not in which he still call the writer’sgrandma ‘Dear’ many years’ marriage.Detail 2:Although he got married for a long time,he still remembered the gift he gave to thewriter’s grandma first date.
