.He _________ at once when I promised to help him.

Excuse me, could you spare me some time? —Sorry, I ______ a lecture in the hall in a few minutes

I have been living in the United States for twenty years,but seldom _______ so lonely as now.

Lily is so kind-hearted a girl that she often gives__________ needs her help

We should always be _________ the people who have helped us in our lives.