41d
42a
43b
44d(tham khảo c44)
45c
46..........a foreign language is very interesting
47 ........... I had a computer
48 .......will be built here
49 ........he works harder, he'll lose his job
50.........wasn't invited to the party, she was annoyed
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26c
27c
28a
29b
30a
31 learning
32 surprised
33 vocabulary
32 with
35 improved
36c
37a
38b
39c
40b
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1->4: đúng
5a
6 was listening
7hasn't met
8 to come
9 be solved
10 Should you study
11 friendly
12 invention
13 carefully
14 compulsory
15 pollute
16a
17đúng
18B
19c
20d
21a
22c
23d
24c
25b