【单选题】If you are already_ before you arrive at the airport, you can go straight to check in kiosk and print your boarding pass.
【单选题】I'll return it to you before you arrive at the destination.
【单选题】If you' re already ____ before you arrive at the airport, you can go straight to a check-in kiosk and print your boarding pass.
【判断题】新加坡是除中国大陆、台湾、港澳地区以外唯一拥有小学、中学、大专完整华文教育体系的国家。
【单选题】以下哪种操作是不正确的
C.
操作完成后,按正确步骤关机,打扫卫生后离开车间