Jack always complains ________ Kate ____________ his past.[ ]

______ the news that her son was still alive, tears rolled down the old woman’s face.

A low-carbon(低碳) lifestyle has an effect our daily life. People are paying more and more attention to energies these days.

There_____ to be a wasteland and now stands a building.

I got to the party late. By the time I arrived, some people ______ home already.