--- It’s difficult for the village children to cross the river for school.--- I think a bridge _______ over the river. 

— Have all the students know that our class will visit the factory this afternoon.— Yes , Every student ________ about it.

---I called you yesterday evening, but no one answered.---Oh, I ____ shopping with my mother.

Look! David is helping his mother _______ the room.

Mr. Black often _______ to the cinema on Saturday evenings .