2. 外语
  3. As the plane circled over the airport, everyone sensed that something was wrong. The plane was moving unsteadily through the air

As the plane circled over the airport, everyone sensed that something was wrong. The plane was moving unsteadily through the air

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问题     As the plane circled over the airport, everyone sensed that something was wrong. The plane was moving unsteadily through the air, and【C1】______the passengers had fastened their seat belts, they were suddenly【C2】______forward. At that moment, the air-hostess【C3】______.She looked very pale,  but was quite【C4】______.Speaking quickly but almost in a whisper, she【C5】______everyone that the pilot had【C6】______and asked if any of the passengers knew anything about machine or at【C7】______how to drive a car.  After a moment’s【C8】______, a man got up and followed the hostess into the pilot’s cabin. Moving the pilot【C9】______, the man took his seat and listened carefully to the【C10】______instructions that were being sent by radio from the airport【C11】______. The plane was now dangerously  close【C12】______the  ground, but  to everyone’s【C13】______, it soon began to climb. The man had to【C14】______the airport several times in order to become【C15】______with the controls of the plane.【C16】______the danger had not yet passed. The terrible【C17】______came when he had to land. Following【C18】______, the man guided the plane towards the airfield. It shook violently【C19】______it touched the ground and then moved rapidly【C20】______the runway and after a long run it stopped safely.
【C19】
选项 A、as
B、unless
C、while
D、so
答案A
解析 逻辑衔接题。主句后面是一个时间状语从句，所以由as引导。as“当…时候”，如：I saw him as he was getting off the bus．(正当他下公共汽车时，我看见了他。)while引导的状语动作是一段时间，与本句中的突然动作不符；unless“除非”和so“因此”不引导时间状语。
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大学英语四级

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