I – II – III – IV – V.

II – III – IV – V – I.

IV – V – I – II – III.

V – II – III – IV – I.

V – IV – II – I – III.

Each plane is directed by just one controller.

Ground controllers observe planes on radar only.

The radar room is located above the control tower.

Airplane landings have priority over departures.

When visibility is good, ground controllers are not needed.

controllers (line 6).

planes (line 6).

delays (line 7).

airspaces (line 8).

arrivals and departures (lines 8 - 9).

results from a change in a plane's speed

is caused by inexperienced pilots.

is very dangerous for airplanes.

cannot be detected by controllers.

will never be noticed by pilots.

works entirely alone in his designated airspace.

is responsible for alerting pilots to several potential dangers.

is an inexperienced member of the team of air traffic controllers.

is the only person responsible for conducting a plane to its destination.

predict dangerous weather conditions.

assist pilots in their landing procedures.

train pilots to find safe landing locations.

calm down colleagues who are too stressed.

prevent any changes in original flight courses.

He likes it because it is risky and unsafe.

He considers it the worst profession to choose.

He wishes pilots were less nervous and stressed.

He finds it one of the most demanding jobs he has ever had.

He fears the responsibility of guiding pilots to a safe landing.

land (line 5) – take off.

safe (line 12) – stormy.

high-paced (line 17) – busy.

they provide lateral support to vertical slopes of soil.

they stabilize soil and/or rock from down slope movement.

they are structures sometimes referred to as backfill.

they provide support for vertical or non-vertical grade changes.

retaining wall.

slope.

retained soil.

structure.