考生必看：托福常用短语必备表达(三)
backseat driver指手划脚的人
bad egg(lot)好人
bag of bones骨瘦如柴的人
bake down临阵畏缩
barking up the wrong tree进犯错了目标
barter away以较廉价的价钱出售
bawl out求全非难
Be a good sport!不要婆婆妈*!
be nuts傻里傻气
be off走吧;滚蛋
Be off!滚蛋!
be on the wagon喝酒
bear in mind服膺在心
beat around the bush说话绕圈子
beat it走开
beat one's brains (out)伤透了脑筋
beat sb by miles远远赛过
beat, be太累了
beef about埋怨
beef up增强
before you are scheduled to leave在你决议分开之时候前
Before you could say Jack Robinson很快
before you know it很快
behave yourself请检点一点
behind bars *
behind one's back面前
behind the scenes(curtain)在幕后