... publicbuildings, on any public transportation ( including airplane flights within the UnitedState), in shops, in movies theaters, schools, and office buildings. The general rule isif you are indoors, ... been finished/ arrived B. have finished/ arrivedC. had finished/ were arriving D. have been finished/ were arrivedCâu 19: Higher education is very importance to national economies, and it is also ... opportunities are finding in big cities. A B C D34. I feel very anxiously because this is the first time I come to the interview. A B C D35. Don’t forget to say goodbye to the interviewer...