1 A
2 sai đề
3 D
4 C
5 D
6 C
7 C
8 D
9 B
10 D
11 C
12 B
13 B
14 B
15 D
16 B
17 D
18 A
19 C
20 D
21 D
22 A
23 B
24 B
25 C
26 C
27 D
28 A
29 B
30 D
31 C
32 B
33 A
34 A
35 eat
36 do you do
37 built
38 is
39 Did you watch
40 went
41 have lived
42 haven't seen - said
43 were playing
44 was cooking - was reading
45 forgets
46 have been
47 died
48 will buy
49 is sleeping