小题1:enjoying the benefits of
小题2:the convenience for bicycles
小题3:reduce pollution
小题4:provide free public transport
小题5:painted hundreds of bicycles white
小题1:句意：人们一直在享受骑车的好处：enjoying the benefits of用现在分词做表语
小题2:句意：因为自行车的便利，人们把阿姆斯特丹叫做自行车城。the convenience for bicycles
小题3:前面是save energy节约能源和减少污染对应： reduce pollution
小题4:提供免费的公共交通：provide free public transport
小题5:句意人们把自行车漆成白色：painted hundreds of bicycles white