in, with, out; test, testing, tested During the 54-minute flight from Montreal’s Dorval airport to Toronto, the first class cabin was filled _________ reporters and photographers _________the still-evolving technology.
with，testing
in, with, out; test, testing, tested During the 54-minute flight from Montreal’s Dorval airport to Toronto, the first class cabin was filled _________ reporters and photographers _________the still-evolving technology.
with，testing
