Question 19. It….... quicker if you use a computer.
A. will be B. would be C. were D. been
Question 20. One of the best solutions to get rid of non-biodegradable wastes is .
A. burning B. dumping C. recycling D. buying
Question 21. English is used by pilots to ask for landing in Cairo.
A. instruct B. instructors C. instructions D. instructive