16.It is no doubt that once ____ this city, you’ll find that there is so much surprise waiting for you to discover.
visit B. visiting C. visited D. to visit
16.It is no doubt that once ____ this city, you’ll find that there is so much surprise waiting for you to discover.
visit B. visiting C. visited D. to visit
B
本句话为省略,once后省略了you are,所以选择visiting。