D
The following is a timetable in Shanghai Pudong International Airport．
71. A man wants to take Flight 178 to Tokyo. Which gate should he go to?
A. 14      B. 28   C. 21         D. 18
72. Lisa is at gate 23. Where is she going?
A. Paris   B. Beijing      C. Tokyo         D. New York
73. Now it’s 10:40. Mary is at gate 20. Which airline’s plane will she take?
A. British Airways        B. Japanese Airlines
C. Pan American           D. Air Canada
74. Gate _______ is the busiest among all these gates.
A. 23         B. 18           C. 24    D. 15
75. Which airline’s flights cover the longest route(行程)?
A. CAAC                                       B. Pan American 
C. British Airways                                  D. Air Canada