Mr. Green has two sons, and one of ______ is working as a bus driver now.
I’m sorry to have ______ you with too many questions on such an occasion.
Your efforts to develop good habits will ______ later, and it is well worth working hard to do so.
— Why don’t his colleagues like to get along with him?— He’s always saying what he thinks ______ other people’s feelings.
Your phone ______ for several minutes now. Why don’t you answer it?
You can’t see things clearly through a telescope unless it is _____ correctly to your sight.