A. is it                        B. isn't it                        C. was it                        D. wasn't it               
77. We have _______ books in our library.
A. plenty of                B. great many                C. a great deal of                D. great number of
78. The police saw the woman _______ a bus and _______ a taxi.
A. get off …get on                                B. get on … get off
C. get off …get into                                D. get on … get into       
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        liuxuepaper.com