Many city people their bikes to work every day.

It was so dark in the theatre that I couldhardly ________ my friend.

Come and join us, Betty!— I’m afraid I can’t. I’m too busy now. If I ______ time, I would certainly go.

The mother asked her son_________.

To be on the safe side, we should fill up the tank now, because we ______ run out of gas on the way.