When several runway are in use and there is any possibility that the pilot may be confused as to which one to use, the （ ） should be stated in the take-off clearance.

It is occasionally necessary to cancel the take-off clearance due to （ ）.

Which statement below is not true concerning vehicle movement on the maneuvering areas?

In order to save taxiing time for training purpose pilots may request to make a "Touch and go", which means the aircraft （ ）.

In case that the missed approach is initiated by the pilot "（ ）" shall be transmitted.

After landing, the pilot should switch to ground control （ ）.

The controller will normally issue taxi instructions to the pilot （ ）.

Aerodrome information should not be passed to aircraft （ ）.

Which of the following is not a usual method to establish the radar identification?

When an ATC radar facility issued the following advisory to a pilot flying on a heading of 360°:"Traffic 10 o'clock, 2 miles, southbound..." Where should the pilot look for this traffic?

A clearance to taxi to the active runway means a pilot has been given permission to taxi （ ）.

Which of the following is not true as concerns airport surveillance radar (ASR)?

Code 7500 alerts ATC that （ ）.

Code （ ） is used after the failure of two-way radio communications.

Code 7700 is used for （ ）.