McDonald's, Greggs, KFC and Subway are today named as the most littered brands in England as Keep Britain Tidy called on fast-food companies to do more to tackle customers who drop their wrappers and drinks cartons(盒子) in the streets. Phil Barton, chief executive of Keep Britain Tidy, 【62】______ its new Dirty Pig campaign, said it was the first time it had investigated which 【63】______ made up "littered England" and the same names appeared again and again. "We 【64】______ litterers for dropping this fast food litter 【65】______ the first place but also believe the results have pertinent (相关的) messages for the fast food 【66】______ McDonald's, Greggs, KFC and Subway need to do more to 【67】______ littering by their customers". He recognised efforts made by McDonald's, 【68】______ placing litter bins and increasing litter patrols, but its litter remained "all too prevalent". All fast food chains should reduce 【69】______ packaging, he added. Companies could also, reduce prices 【70】______ those who stayed to eat food on their premises, offer money-off vouchers(代金券) or other 【71】______ for those who returned packaging and put more bins at 【72】______ points in local streets, not just outside their premises. A 【73】______ for McDonald's said: "We do our best. Obviously we ask all our customers to dispose of litter responsibly", Trials of more extensive, all-day litter patrols were 【74】______ in Manchester and Birmingham. KFC said it took its 【75】______ for litter management "very seriously", and would introduce a programme to reduce packaging 【76】______ many products. Subway said that it worked hard to 【77】______ the impact of litter on communities, 【78】______ it was "still down to the 【79】______ customer to dispose of their litter responsibly". Greggs said it recognised the "continuing challenge for us all", 【80】______ having already taken measures to help 【81】______ the issue. 62.