—Who______ it be that is knocking at the door? —It ______ be Father, but I’m not sure.
1 feel that one of my main duties ______ a teacher is to help the students to become better learners.
___ he did it remains a secret.
It was a pity that the great writer died _________his works unfinished.
That is not ____ I want.
In order to change attitudes _______ employing women, the government is bringing in new laws.