A. engage; enjoy B. to engage; to enjoy C. engaging; enjoying D. engaged; enjoyed
单项选择题The China National Tourism Administration was established in ().
A. 1967 B. 1964 C. 1981 D. 1991
单项选择题With the growing (), business travel is covering an ever widening sector of the world.
A. international tourism B. familiarization C. internationalization of business D. export-oriented business