He is an old doctor with a lot of ________. But he has never travelled by air before.Taking a plane was quite ________ experience for him this time.
He mentioned in the letter that he ______ join us once he ______ our invitation.
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.