If I ___ the answer to the question , I ____  you..

The meeting is not over, and you____ not leave.

At a construction site in our city the workers have uncovered an ancient wall that_______ to keep the enemy out of the city, but it requires further evidence.

You would have helped your mother do some housework. But you ____.

---Your sister nearly _______ all her spare time to her study during the three years. ----That's right， or she ________ the first place in her school in the College Entrance Examination.