单项选择题A．The apartment was very dirty.B．He had his old furniture cleaned.C．He found an apart with a big yard.D．The furniture was very inexpensive.

单项选择题A．Aviation and Transportation Security Act was passed.B．Ensuring the safety of passengers and aircraft became a major concern at airports.C．Airport security became the responsibility of the federal government.D．Security personnel required each passenger show photo identification before entering an aircraft.