80.　 I am sorry to have kept you ___. A. wait　　　　　　 B. to wait　　　 　 C. awaiting　　　　　　　 D. waiting.

79.　 In addition ____ that, he has many other things to do.

A. to do　　　　　　　　 B. doing　　　　　　　　 C. do　　　　　　　　　　　　　 D. to doing

78.　 She is unequal ____ the job. A. to do　　 B. to going　　　　　　 C. do　　　 D. doing

77.　 I don’t like ___ there now. A. go 　 B. to go　 C going　　　　 D. be going

76.　 Revolution means __ the productive forces.

　A. to liberate　 B. to set free 　　 C. liberating　 D. liberate

75.　 He has not objection ___ that. A. doing B. to do C. to doing　 D. to have done

74.　 He has no other alternative but ____. A. wait 　　　 B. waiting　 C. to wait　 D. waited

73.　 I’d like you _____ to see him. A. go 　　 B. going　 C. to go　 D. have gone

72.　 He preferred ____ rather than surrender to the enemy.

A. die　　　　　　　　　　 B. dying　　　　　　　　 C. to die　　　　　　　　　　　 D. having died

71.　 You’d best ___ here. A. to stop 　　 B. shopping　　　　　 C. stop　　　　　 D stopped