Only one of the places is ____.[ ]

I ____ have supper until my mother ____ back every day.

Is there any flight to New York?— I think there ______ be, for it is snowing so heavily. [ ]

He was so foolish _____ his car unlocked.

I’ m surprised to hear that Sue and Paul have ________ . —So am I. They seemed very happy together when I last saw them.