______ a new house is impossible for the young couple because they haven’t saved enough money

We ____ on this project for four hoursLet’s have a rest

His English, ______ used to be very poor is now excellent.

It was very kind of the boy to tell us ________ the location of the newly-built railway station, so it only took us about ten minutes to find it.

To his disappointment, the opinion he had stuck ______ out wrong.