Directions: Listen to the statements and fill in the missing words in the blanks. 1. For ground operation, flight ________________ (1)duties have been organized in accordance with an area of responsibility concept. 2. The captains and ____________ (2) have their own responsibilities. 3. All steps have to be performed prior to each originating flight or following a crew change or _______ (3) action. 4. Any lights, which are not illuminated during a system test, will be checked by _______(4). The appropriate preflight procedures will be performed from memory. 5. ____________ (5)are used only to verify that ______ (6)items affecting safety have been accomplished.