49. A. catch       B. see            C. find            D. be caught

48. A. When       B. If             C. Though         D. As

47. A. go out       B. go into        C. come out        D. come out of

46. A. knife        B. paper         C. stamp          D. stamps

45. A. where       B. how           C. when          D. what

44. A. show        B. open          C. buy           D. sell

43. A. closed       B. are closed      C. are closing     D. closes