Răspuns:
1.used to
2.used to
3.do,don't
4.Can
5.do
6.can't
7.did
8.could
9.will
10.have
11.can
12.used to,don't have to
13.Shall
14.didn't
15.had to
16.have,will
17.can't,can
18.couldn't
19.didn't have to
20.does
21.shouldn't
22.should
23.can't
24.had to
25.Can
26.can't
27.have to
28.used to
29.Do,don't
30.shouldn't
Explicație:
