Pilots should check the charts for alternate along the flight route before each flight.
举一反三
- During flight, pilots should concentrate on main tasks. It means that（ ）
- Student pilots’ flight training should be a step by step process.
- An international flight passenger should check in at least__________.
- If you ___________ for your flight, you need to cancel checkin to be able to change your flight.
- You must check ( )at the airport an hour before your flight takes off.