there are lots of b___________in big cities it is convenient lt is for people to go outside
问题描述：
there are lots of b___________in big cities it is convenient lt is for people to go outside
答
busy traffics
繁忙的交通
答
there are lots of buses in big cities it is convenient lt is for people to go outside
大城市有许多公交车方面市民出行
答
buses 巴士
意思是：大城市有许多便利的公交巴士，是为了便于人们外出。
答
bus
答
有很多的b 在大城市很方便lt是人们外出
答
buses