Not until recently _______the development of tourist-related activities in the rural areas.

d me that he had two girl-friends,and neither of _______ knew anything about the other.

Standing on the top of the hill, one would not do anything, but _____ the flowing of the clouds around me.

Why did you cancel your trip to the New York? —We were just about to leave_______ it started to snow

When spring comes, it gets .