79. Do you mind ______ how you succeed?
A. if I go and see B. if I go seeing C. my going and see D. my go to see
80. The boy would have died, _______ on him without delay.
A. if the doctor didn't operate B. if the doctor wouldn't operate
C. would the doctor not operate D. had the doctor not operated
81. Only when ______ in 1918, ______ happily back to work.
A. the war was over … he went B. was the war over … did he go
C. the war was over … did he go D. was the war over … he went
82. ——Who telephoned just now?
——Sorry. I couldn't ______ the voice.
A. recognize B. realize C. know D. understand
83. He had ______ in finding Mr. Green's house.
A. many difficulties B. many difficulty
C. much difficulties D. much difficulty
84. I don't want to _______ money on such books.
A. cost B. pay C. spend D. take
85. ——Thank you for your help. ——________.
A. All right B. That's right C. You're right D. That's OK
86. The man is standing _______ his back _______ the fire.
A. with … to B. with … against C. on …for D. at … of
87. I looked everywhere in the house ______ a key that had been lost.
A. in searching for B. in search of
C. to search D. searching of
88. I insisted that he_______ at once.
A. leave B. left C. leaves D. leaving