B 开头单词
be fully aware that 完全意识到
be fully aware of 充分意识到 充分了解到
be fully aware 明知；知情
be full of wit 情趣横溢
be full of resource 足智多谋
be full of life 生气勃勃
be full of enthusiasm about 热衷于
be full of conceit 自高自大
be full of 充满
be full 饱足 满的
be frightened of 害怕；对…感到恐惧
be frightened at 对…大吃一惊
be frightened almost to death 吓得要死
be frightened 吓得要命；受惊吓；恐惧
be friends with 对…友好；与…交友
be friendly with 对……友好；和某人友好相处
be friendly to 对…友好/友善
be fretful 生气
be fresh out of 供应完毕 快精疲力尽了（非正式）