B字开头的单词或词组
backgroundbillionbe confronted withbeginboilbutbe open tobitebabybeyondbestburyboughtbannerbroadBritainburntbuttonbe afraid ofbobeneficialbrotherbeanbe typical ofbankboothbear in mindbaseballbuiltbe good forbeaverbe willing toboth A and Bblankbe packed withbothboostBuddhismbe covered withback upbopbike
