This kind of work a high level of concentration.
Later in this chapter cases will be introduced to readers _____ consumer complaints have led to changes in the law.
----Mr. Smith is no longer ______ he used to be. ----So he is. Success and wealth have _______ his character.
He wrote a lot of novels, ______ regarded as masterpieces.
Don’t forget to turn on your radio at 7 p.m. this evening. We’ll be back _______ then.
----Did you see the manager in the office? ----Yes. He _______ by a journalist from China Daily.