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43. I‘m wondering why he hasn’t turned _____ at the meeting. A. down B. up C. out D. over 44. Contrary _____popular belief, moderate exercise actually decreases your appetite. A. on B. at C. against D. to 45. _____ the storm, we have to postpone the flight. A. Owing to B. Thanks to C. Because D. As 46. By using both ears one can tell the direction _____ a sound es. A. in which B. from which C. over which D. with which 47. When she worked with the government, she _____ the difficult task of monitoring elections. A. overworked B. overtook C. underwent D. undertook 48. Apparently, it wasn‘t an accident. Someone must have done it on _____. A. intention B. determination C. purpose D. reason 49. _____ conclusion, walking is a cheap, safe and enjoyable form of exercise. A. In B. On C. By D. As 50. Julie went to the _____ to buy a pair of shoes. A. shoes store B. shoe‘s store C. shoe store D. shoes’ store 51. He has called a meeting of all parties with a _____ to form a new government. A. purpose B. reason C. view D. goal 52. Gazing into his eyes, she seemed to have _____ all he said. A. taken up B. taken over C. taken off D. taken in 53. In every major city there are more _____apartments than there are homeless people. A. blank B. vacant C. empty D. bare 54. They claim that _____$150 million is to be spent on improvement. A. suffici