71. What does a computer do with the information______?

　 A. receiving　　　　　　　　　　 B. to be received

　 C. received　　　　　　　　　　 D. having received

70. The problem ______ at the meeting yesterday is serious to us.

　 A. to be discussed　　　　　　　　 B. being discussed

　 C. discussing　　　　　 　　　　　D. discussed

69. The problem ______ at the meeting tomorrow is serious to us.

　 A. to be discussed　　　　　　　　 B. being discussed

　 C. discussing　　　　　　　　　　 D. discussed

68. The problem ______ at the meeting now is serious to us.

　 A. to be discussed　　　　　　　　 B. being discussed

　 C. discussing　　　　　　　　　　 D. discussed

67. A new factory is reported ______ next year in our county.

　 A. to build　　　　　　　　　　　 B. to be built

　 C. building　 　　　　　　　　　　D. built

66. He is said ______ in America when he was young.

　 A. to work　　　　　　　　　　 B. working

　 C. having worked　　　　　　　　 D. to have worked

65. We were made ______ for two hours.

　 A. to wait　　　　　　　　　　 B. wait

　 C. waiting　　　　　　　　　　 D. waited

64. In the old days the workers were made ______ day and night.

　 A. work　　　　　　　　　　　 B. working

　 C. to work　　　　　　　　　　 D. worked

63. Who left the door ______ and the windows ______?

　 A. open, closed　　　　　　　　 B. opening, closing

　 C. to open, to close　　　　　　　 D. opened, closed

62. I found my English book ______ when I went home.

　 A. losing　　　　　　　　　　　 B. missed

　 C. going　　　　　　　　　　　 D. missing