... public buildings, on any public transportation ( including airplane flights within the United State), in shops, in movies theaters, schools, and office buildings. The general rule is if you are indoors, ... been finished/ arrived B. have finished/ arrived C. had finished/ were arriving D. have been finished/ were arrived Câu 19: Higher education is very importance to national economies, and it is also ... university, and people who have the right skills will have a big advantage in the competition for jobs. If you decide to go straight into a job, there are many opportunities for training. Getting...