It is necessary to occasionally overbook NOT because:

Airlines will （） to allow for the high number of （）, but must exercise caution. A: overbook, independent travelers B: overbook, no-shows C: underbook, business travelers D: underbook, repeat travelers

超额预定的英语翻译为（）。 A: overbooking B: overbooked C: overbook D: bookedover

U.S. airlines are allowed to overbook flights to ______ "no-show" passengers. A: greet B: admit C: admit for D: allow for