—Mr. Smith is no longer the man who he used to be.—So he is. Success and wealth have ______ his character.
53. --- Please tell me how to work out this maths problem. --- Use your ______ , then your find a way.
54. Because of the year 2008 Olympic Games, the American corporation board of trustees(董事会) decided to set up a Chinese _____ in Beijing.
55. All ____ not baked in one oven. (prov.)
56. He said under his breath that he would keep the secret. The underlined part means _____.
57. The rain was coming down in buckets. This sentence means ____ .