1 unimportant
2 unkind
3 unpopular
4impossible
5 unhappy
6 fasten
7 competition
8 athlete
9 unsuccessful
10 sportmanship
11 delegate
12 warmthly
13quickly
14 amazed
15 carelessly
16 beautifully
17 regularly
18 cooperation
19 pollution
20 expectation
21 protection
22 performance
23 product
24 education
25 thrilling
26 pollution
27 gently
28 happily
29 polluted
30 successfully
31 preparation
32 boring
33 collection
34 similarities
35 amusing
36 accidentally
37 decision
38 weakness
39 unforgetable
40 impatience
41 careless
42 competitors
43 addiction
44 lengthened
45 unidentified
46 unfashionable
47 preventing - prevention
48 singer
49 musical
50 children
e có thể chia bài ra đc chứ, e cũng biết là hơi bị nhiều mà