C級核心詞匯推薦：
breakfast n. 早餐;
breath n. 呼吸；氣味(hold one’s breath/屏息; at a breath/一口氣);
breathe v. 呼吸;
bridge n. 橋，橋牌(play bridge/打橋牌);
brief adj. 簡短的，短暫的（short - brief短暫的）(in brief/簡單地說；簡明扼要的);
briefly adv. 暫時(shí)地，簡要地;
bright adj. 明亮的，燦爛的, 聰明的; (bright – clever – intelligent – smart –wise 聰明的)
brilliant adj. 燦爛的(brilliant - bright)，有才氣的；卓越的(brilliant – outstanding卓越的);
bring v. 拿來，帶來，產(chǎn)生；引起( bring about/引起，造成; bring forward/把……提前；提出; bring out/使出現(xiàn)， 使顯露; bring up/提出；養(yǎng)育);
Britain n. 英國；不列顛(英格蘭，威爾士和蘇格蘭的總稱;
British adj. 不列顛的；不列顛人的；英國的；英國人的n. 不列顛人，英國人;
broad adj. 寬的，廣泛的; (broad –wide寬的)
broadcast n. 廣播；播音 v廣播播送，播放;
brother n. 兄弟;
budget n. 預(yù)算;
build v. 建造，建筑(build up/堆積，逐步建立); (build -- establish建立, 創(chuàng)立)
building n. 建筑物，建筑業(yè);
burn v. 燒，使感覺燒熱(burn out/(使)燒壞；燒光；燒盡; burn up/燒完；燒盡；燒光);
burst v. 爆裂，爆發(fā)(burst into tears[laughter]/突然大笑[突然大哭]);
bus n. 公共汽車(take the bus/乘公共汽車; get on[off] a bus/上[下]公共汽車);
business n. 商業(yè)；買賣；交易；生意；事情
busy adj. 忙碌的；熱鬧的(be busy with [about, in]/忙于; keep sb. busy/不讓某人空閑);
but prep. 除……以外 conj. 而是，但是； adv. 幾乎，僅僅(but for/要不是) ;
buy v. 買; (but – purchase 購買)
by prep. 在附近，在旁邊；經(jīng)，由；依據(jù)，按照；通過；用 adv. 通過，經(jīng)過；附近( by air/railway/sea/plane/bus/乘飛機(jī)/火車/船/飛機(jī)/公共汽車; pass by/經(jīng)過；by the rule/按規(guī)則; by oneself/單獨(dú)，獨(dú)自);
cake n. 蛋糕，餅(a piece of cake/[口]輕松的事，愉快的事);
calculate v. 計(jì)算，考慮(calculate on (upon)/指望著，期待著); (calculate – count – figure 計(jì)算)
call n.叫聲；命令，號召； v. 呼叫；召集；稱呼；打電話(call for/需要；要求; call off/取消; call on/拜訪; call for help/呼救; call sb. /叫……；給……打電話);
calm adj. (天氣、海洋等)靜的 v. (使)平靜，(使)鎮(zhèn)定；平息(keep calm!/安靜! 保持鎮(zhèn)靜! calm down/使平息，使平靜);
breakfast n. 早餐;
breath n. 呼吸；氣味(hold one’s breath/屏息; at a breath/一口氣);
breathe v. 呼吸;
bridge n. 橋，橋牌(play bridge/打橋牌);
brief adj. 簡短的，短暫的（short - brief短暫的）(in brief/簡單地說；簡明扼要的);
briefly adv. 暫時(shí)地，簡要地;
bright adj. 明亮的，燦爛的, 聰明的; (bright – clever – intelligent – smart –wise 聰明的)
brilliant adj. 燦爛的(brilliant - bright)，有才氣的；卓越的(brilliant – outstanding卓越的);
bring v. 拿來，帶來，產(chǎn)生；引起( bring about/引起，造成; bring forward/把……提前；提出; bring out/使出現(xiàn)， 使顯露; bring up/提出；養(yǎng)育);
Britain n. 英國；不列顛(英格蘭，威爾士和蘇格蘭的總稱;
British adj. 不列顛的；不列顛人的；英國的；英國人的n. 不列顛人，英國人;
broad adj. 寬的，廣泛的; (broad –wide寬的)
broadcast n. 廣播；播音 v廣播播送，播放;
brother n. 兄弟;
budget n. 預(yù)算;
build v. 建造，建筑(build up/堆積，逐步建立); (build -- establish建立, 創(chuàng)立)
building n. 建筑物，建筑業(yè);
burn v. 燒，使感覺燒熱(burn out/(使)燒壞；燒光；燒盡; burn up/燒完；燒盡；燒光);
burst v. 爆裂，爆發(fā)(burst into tears[laughter]/突然大笑[突然大哭]);
bus n. 公共汽車(take the bus/乘公共汽車; get on[off] a bus/上[下]公共汽車);
business n. 商業(yè)；買賣；交易；生意；事情
busy adj. 忙碌的；熱鬧的(be busy with [about, in]/忙于; keep sb. busy/不讓某人空閑);
but prep. 除……以外 conj. 而是，但是； adv. 幾乎，僅僅(but for/要不是) ;
buy v. 買; (but – purchase 購買)
by prep. 在附近，在旁邊；經(jīng)，由；依據(jù)，按照；通過；用 adv. 通過，經(jīng)過；附近( by air/railway/sea/plane/bus/乘飛機(jī)/火車/船/飛機(jī)/公共汽車; pass by/經(jīng)過；by the rule/按規(guī)則; by oneself/單獨(dú)，獨(dú)自);
cake n. 蛋糕，餅(a piece of cake/[口]輕松的事，愉快的事);
calculate v. 計(jì)算，考慮(calculate on (upon)/指望著，期待著); (calculate – count – figure 計(jì)算)
call n.叫聲；命令，號召； v. 呼叫；召集；稱呼；打電話(call for/需要；要求; call off/取消; call on/拜訪; call for help/呼救; call sb. /叫……；給……打電話);
calm adj. (天氣、海洋等)靜的 v. (使)平靜，(使)鎮(zhèn)定；平息(keep calm!/安靜! 保持鎮(zhèn)靜! calm down/使平息，使平靜);