Odpowiedź:
1 I will have to
12 our students must wear
13 did not have to
14 will not have to
15 must not
16 had to read
17 have to water
18 must have
19 mustn't leave
20 had to feed
Nie obiecuje ze jest dobrze, moim zdaniem można użyć tez innych modalnych.
Wyjaśnienie: