As the plane circled over the airport，everyone sensed that something was wrong. The plane was moving unsteadily through the air，and although the passengers had (11) their seat belts，they were suddenly (12) forward. At that moment，the air-hostess appeared.

As the plane circled over the airport，everyone sensed that something was wrong. The plane was moving unsteadily through the air，and although the passengers had (11) their seat belts，they were suddenly (12) forward. At that moment，the air-hostess appeared. She looked very pale，but was quite calm. (13) quickly but almost in a whisper，she informed everyone that the pilot had fainted and asked (14) any of the passengers knew anything about machines or at least how to drive a car. (15) a moment's hesitation，a man got up and followed the stewardess(空中小姐)into the pilot's cabin.

Moving the pilot aside. the man took (16) and listened carefully to the urgent instructions that were being sent by radio from the airport (17) . The plane was now dangerously close to the ground，but to everyone's relief，it soon began to climb. The man (18) circle the airport several times in order to become familiar with the controls.

Following instructions，the man guided plane towards the airfield. It shook (19) as it touched the ground and then moved rapidly across the field，but after a long run it stopped safely. Outside，a crowd of people who (20) anxiously，rushed forward to congratulate the“pilot”on a perfect landing.

A. installed

B. fastened

C. connected

D. held