6 Pour chaque phrase, choisissez la bonne proposition.
1° Is it possible she saw the film? a. Can she have seen the film? b. Could
she see the film?
2° It's very possible they won't come. a. They might come. b. They might
have come.
3° It is impossible for them to be with us. a. They can't come. b. They can't
have come.
4° It is impossible that they were here. a. They can't come. b. They can't
have come.
5° It is very difficult to believe there were aliens in Roswell. a. There might
have been aliens. b. There must have been aliens.