题目内容
B. A school girl with her valid student card
C. A policeman in his forties
D. A U.S. army officer on active duty
ticket each time, you can buy a _____ ticket.
B. Special Admission
C. 3 Day Admission
D. 7 Day Admission
B. show which groups of people can get admission into the Expo Park
C. provide information about the Expo tickets and regulations
D. introduce all the visiting regulations in the Expo Park
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