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

As the place 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 place 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 machines--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 to ward 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 as“当……时刻，在……期间，如I watched her as she combed her hair”；unless“除非，除非在……时候”，while“在……时候，在……期间(两个动作同时进行He fell asleep while he was doing his homework”，30表因果。故正确答案为A。
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大学英语四级

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