38. My uncle ________ in that factory since 1958.

　　A. worked B. had worked C. is working D. has worked

　　39. I ________ her since she was a little girl.

　　A. knew B. know C. had known D. have known

　　40. He ________ for three years.

　　A. has joined B. has been in the army C. joined D. has served the army

　　41. His grandfather ________ for thirty years.

　　A. died B. was dead C. has been dead D. has died

　　42. I ________ a college student for more than a year.

　　A. became B. have become C. was D. have been

　　43. I ________ this radio for two years.

　　A. used B. use C. have used D. am used

　　44. I ________ from my brother for a long time.

　　A. not have heard B. have not heard C. have heard not D. do not hear

　　45. Since you don't want to go, I ________ alone.

　　A. will go B. go C. went D. have gone

　　46. He________ his watch. Have you seen it anywhere?

　　A. lost B. lose C. has lost D. had lost

　　47. I ________ the exhibition on the life and work of Lenin.

　　A. see B. saw C. have seen D. am seeing

　　48. When I was a little boy my father ________ me the earth is round.

　　A. tells B. has told C. had told D. told

　　49. You ________ your homework..

　　A. haven't done B. have doing C. have not doing D. not done

　　50. Our teacher ________ to Beijing three times.

　　A. went B. had done C. has gone D. has been