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📝 本组单词列表
1.biology
2.bird
3.birth
4.birthday
5.biscuit
6.bit
7.black
8.blackboard
9.bleed
10.blind
11.block
12.blood
13.blouse
14.blow (blew-blown)
15.blue
16.board
17.boat
18.body
19.book
20.boring
21.born
22.borrow
23.boss
24.both
25.bottle
26.bottom
27.bowl
28.box
29.boy
30.brain
31.brave
32.bread
33.break
34.breakfast
35.bridge
36.bright
37.bring
38.brother
39.brown
40.brush
41.budget
42.build
43.building
44.burn(burnt-burnt)
45.bus
46.business
47.busy
48.but
49.butter
50.butterfly