The fire made _____ difficult to rescue the peopletrapped under the ruins in the earthquake.

We have done things we ought not to have done and ________ undone things we ought to have done

Jackie Chan is __________ actor.—Yes, I like him very much.

it’s up to you, Aunt Ellen, _____ you stay orgo.

How much did the new watch yoursister— She 350yuan for it.