In Europe _______ are the two leading contenders for a global reservations system.
C
暂无解析
Poor speaker of English though he was at the time, he still managed to make himself ________.
You’ll be there tomorrow -- you won’t ________ me ________, will you ?
As for family education, parents are encouraged to rely on ________ rather than punishment.
Thehousewasquietinthenight,________theoccasionalcoughingfrommythroat.