After going into the concert hall, the mother ________ a friend and went over to greet him.
When I was young, my father taught me that the earth ______ around the sun.
Let Harry play with your toys ______, Clare. You must learn to share.
Steel and iron can be used ______ bridges as well as machines.
Children are always ______, and usually think differently from adults.
I’m sure you ______ to us just now, because we already know the truth.