28. The reason for his success is ______ he worked very hard.
Let us hope we can settle the matter without _____ more trouble.
-What do you think of the book? -Oh, excellent. It is worth _____ second time.
His best known work that is _____ all praise can be seen in the museum.
I hate ______ their complains all day. one of these days I’ll tell them what I really think.
Don’t be joking. It’s time to ______ your business.