Resposta :
1) Could
2) Couldn't
3) Could
4) Can
5) Couldn't
6) Couldn't
7) Could
8) Can't
9) Couldn't
10) Could
11) Couldn't
12) Can't
13) Couldn't
14) Can
15) Can't
16) Could
17) Could
18) Couldn't
19) Can't
20) Can't
1) Could
2) Couldn't
3) Could
4) Can
5) Couldn't
6) Couldn't
7) Could
8) Can't
9) Couldn't
10) Could
11) Couldn't
12) Can't
13) Couldn't
14) Can
15) Can't
16) Could
17) Could
18) Couldn't
19) Can't
20) Can't