the narrow streets 为什么加s

求教:The narrow streets can hardly accommodate the increasingl The old town has narrow  streets and small houses_____a PS:1.The old town has narrow streets and small houses ____ a Several people were robbed in the dark and narrow(窄的)streets Beijing's roads were narrow in the The cleaner’s job is_____(clean)the streets.怎样填空?为什么? The cleaner’s job is_____(clean)the streets.为什么可以填 to clean make one's way down the streets enjoy the city's quiet streets Jinan's roads were narrow in the past 英语翻译Seriousr research helps narrow the possibilities.Spend s These two streets are too narrow.They must be____(wide).