Don’t discuss the problems with your partner unless you ___ to do so.

---It’s difficult for the villagers to cross the river. ---I think a bridge______ over the river.

— It’s difficult for the village children to cross the river for school.— I hear a new bridge _______ over the river in a year.

A new house ___ at the corner of the road.

The stones are so heavy. How _____ they _____ to the top of the building without modern machines?