Ans that question

Dear Student.
1) a) Teacher teaches science.
    b) Does the teacher teach science?
    c) Teacher has to teach science.
    d) Yes! The teacher teaches science.
2) a) Children plant saplings.
    b) Do the children plant saplings?
    c) Children have to plant saplings.
    d) Wow! Children plant saplings.
3) a) We saw an interesting match.
    b) Did we see an interesting match?
    c) We have to see an interesting match.
    d) Great! We saw an interesting match.

We hope that this answer solves your query.
Regards.