21. back

　　He slipped and fell on his back. 他仰天滑到。

　　22. balance

　　Don't get excited; keep your balance. 不要沖動(dòng)，保持冷靜。

　　23. base

　　A naval base is located at Wei Hai. 威海有個(gè)海軍基地。

　　24. behavior

　　Tom won a prize for good behavior at school. 湯姆在學(xué)校里得到品行優(yōu)良獎(jiǎng)。

　　25. belief

　　He has lost his belief in God. 他已不相信上帝。

　　26. birth

　　That baby weighed seven pounds at birth. 那嬰兒生下來七磅重。

　　27. bit

　　He ate every bit of his dinner. 他把他的晚餐吃得光光。

　　She's feeling a bit tired. 她覺得有點(diǎn)疲倦。

　　He doesn't care a bit. 他一點(diǎn)也不在乎。

　　28. bite

　　His face was covered with insect bites. 他滿臉都是蚊蟲咬傷。

　　I haven't had a bite since morning. 我從早晨到現(xiàn)在一口東西都未吃過。

　　There's a bite in the air this morning. 今天早晨有點(diǎn)寒風(fēng)刺骨。

　　29. blood

　　He gave his blood to help his sister. 他輸血給他的妹妹以救她。

　　His blood is up. 他發(fā)脾氣了。

　　His blood ran cold. 他嚇得魂不附體。

　　30. blow

　　Let's go for a blow. 讓我們到戶外吹吹風(fēng)。

　　31. body

　　His body was brought back to England for burial. 他的遺體被運(yùn)回英國埋葬。

　　She's a nice old body. 她是一個(gè)很好的老人。

　　32. brass

　　get down to brass tacks 開門見山

　　33. bread

　　I'm only dong it for the bread. 我純粹是為了錢才做那件事。

　　34. breath

　　They are not be mentioned in the same breath. 他們不可同日而語。

　　There wasn't a breath of air/wind. 一絲微風(fēng)都沒有。

　　35. brother

　　He is my brother. 他是我的兄弟。

　　36. building

　　buidling materials 建筑材料

　　building site 建筑工地

　　37. burn

　　He died of the burns he received in the fire. 他死于火災(zāi)時(shí)所受到的灼傷。

　　38. burst

　　a burst of applause 一陣喝彩

　　39. business

　　He is in business of himself. 他自行經(jīng)商。

　　That's no business of yours. 那事與你無關(guān)。

　　I'm sick of the whole business. 我對這事情實(shí)在感到厭煩。

　　40. butter

　　butter will not melt in sb's mouth 一本正經(jīng)的樣子

　　peanut buttter 花生醬