None of the old people likes living in urban areas, ________

67. None of the old people likes living in urban areas, ________ 
A. Do them             B. does he               C. do they                D. don’t they
68. Neither of the locations was ideal for a new shopping mall, ______?
A. Were they            B. was it              C. weren’t they               D. wasn’t it
69. I believe nothing serious happened,__________ ?
A. Did it                    B. didn’t it                   C. do I                     D. don’t I
70. Sophie has got no major problems living in the new city,____?
A. Hasn’t she           B. has she                  C. does she             D. doesn’t she