9．China Tourism Day should fall on 15th, July, according to Sichuan people, Deng Xiaoping paid a visit to Mount Emei, and made an important speech on tourism.
A. which
B. on which
C. of whom
D. Who
网友回答
A. which
(答案→)B. on which
C. of whom
D. Who
解析：可联系答.案.网客服索取。