No matter how bright a talker you are, there are times when it's better ________ silent.
When I was passing the Town Hall, I heard the clock ______ twelve.
Your brother ______you is very kind to me.
Mr. Smith is very happy because the cars made in his factory have never been ______.
If you are looking for a ______, you can make it when it is on sale.
He has given me so much help that I really want to do something for him ______.