Working hard is not only a __________ of great success, but it is among the essential requirements.
Beginning college is exciting:many of us can be easily excited by _______ details of running _______ well-balanced life.
40. When I was very young, I thought that inside the radio ______ who liked talking very much.
39. ______ has forced people, especially women, to endure a lot of pain and suffering to make themselves more beautiful?
38. Mr. Black ______ home because his briefcase is still on the desk.
37. All animals, ______ their size, breathe once for every four heartbeats.