俗话说“条条大路通罗马”，背诵
21. back
He slipped and fell on his back. 他仰天滑到。
22. balance
Don’t get excited; keep your balance. 不要冲动，保持冷静。
23. base
A naval base is located at Wei Hai. 威海有个海军基地。
24. behavior
Tom won a prize for good behavior at school. 汤姆在学校里得到品行优良奖。
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. 那婴儿生下来七磅重。
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. 她觉得有点疲倦。
He doesn’t care a bit. 他一点也不在乎。
28. bite
His face was covered with insect bites. 他满脸都是蚊虫咬伤。
I haven’t had a bite since morning. 我从早晨到现在一口东西都未吃过。
There’s a bite in the air this morning. 今天早晨有点寒风刺骨。
29. blood
He gave his blood to help his sister. 他输血给他的妹妹以救她。
His blood is up. 他发脾气了。
His blood ran cold. 他吓得魂不附体。
30. blow
Let’s go for a blow. 让我们到户外吹吹风。